Changes in the elastic properties of tendon structures following 20 days bed-rest in humans.

Abstract:

:The purpose of this study was to investigate the effects of 20 days bed-rest on the elastic properties of tendon structures of the human knee extensor muscles in vivo. Six healthy men carried out a 6 degrees head-down bed-rest for 20 days. Muscle volume and maximal voluntary contraction (MVC) torque of the quadriceps femoris muscle significantly decreased by an average of 7.8 (SD 2.7)% and 14.9 (SD 6.9)%, respectively. Before and after bed-rest, the elongation (l) of the tendon and aponeurosis of vastus lateralis muscle was measured directly by ultrasonography, while the subjects performed ramp isometric knee extension up to MVC. The extent of l tended to be greater after bed-rest. The l above 110 N was significantly greater after bed-rest. Furthermore, the mean stiffness after bed-rest [35.5 (SD 7.8) N x mm(-1)] was significantly lower than that before bed-rest [52.6 (SD 19.2) N x mm(-1)]. The rate of torque development significantly reduced after bed-rest by an average of 47%, and the bed-rest induced a lengthening in the electromechanical delay (mean 21%). These results suggest that bed-rest results in a decrease in the stiffness of tendon structures with a reduction of muscle strength and volume. These adaptations of the tendon structures to bed-rest would bring about the changes in electromechanical delay and rate of torque development.

journal_name

Eur J Appl Physiol

authors

Kubo K,Akima H,Kouzaki M,Ito M,Kawakami Y,Kanehisa H,Fukunaga T

doi

10.1007/s004210000309

keywords:

subject

Has Abstract

pub_date

2000-12-01 00:00:00

pages

463-8

issue

6

eissn

1439-6319

issn

1439-6327

journal_volume

83

pub_type

杂志文章
  • Neural activation of the triceps surae is impaired following 2 weeks of immobilization.

    abstract::The purpose of this study was to investigate the effect of 2 weeks of ankle joint immobilization on triceps surae neural activation, with particular emphasis on the potential differences between the monoarticular soleus and the biarticular gastrocnemius muscles. Seventeen male volunteers were divided into the immobili...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-004-1225-z

    authors: Gondin J,Guette M,Maffiuletti NA,Martin A

    更新日期:2004-12-01 00:00:00

  • Accuracy of neuro-fuzzy logic and regression calculations in determining maximal lactate steady-state power output from incremental tests in humans.

    abstract::The aim of this study was to employ neuro-fuzzy logic and regression calculations to determine the accuracy of prediction of the power output ( P) of the maximal lactate steady-state (MLSS) on a cycle ergometer calculated from the results of incremental tests. A group of 17 male and 17 female sports students underwent...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-002-0702-5

    authors: Smekal G,Scharl A,von Duvillard SP,Pokan R,Baca A,Baron R,Tschan H,Hofmann P,Bachl N

    更新日期:2002-12-01 00:00:00

  • Prediction of endurance capacity of quadriceps muscles in humans using surface electromyogram spectrum analysis during submaximal voluntary isometric contractions.

    abstract::The measurement of endurance time ( t(lim)) is the procedure commonly used to quantify the ability of a muscle to maintain force. The relationship between surface electromyographic (sEMG) manifestations of localised muscle fatigue and t(lim) during an effort at 50% of maximal voluntary isometric torque of the knee ext...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-002-0645-x

    authors: Maïsetti O,Guével A,Legros P,Hogrel JY

    更新日期:2002-10-01 00:00:00

  • Spinal motor control differences between the sexes.

    abstract::Activity-related knee joint dysfunction is more prevalent in females than males. One explanation for the discrepancy is differences in movement patterns between the sexes. However, the underlying mechanisms responsible for these differences remain unidentified. This study tested spinal motor control mechanisms influen...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-012-2363-3

    authors: Johnson ST,Kipp K,Hoffman MA

    更新日期:2012-11-01 00:00:00

  • Spontaneous cardiac baroreflex sensitivity is enhanced during post-exercise ischemia in men but not in women.

    abstract:PURPOSE:To investigate the effect of isolated muscle metaboreflex activation on spontaneous cardiac baroreflex sensitivity (cBRS), and to characterize the potential sex-related differences in this interaction in young healthy subjects. METHODS:40 volunteers (20 men and 20 women, age: 22 ± 0.4 year) were recruited. Aft...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-018-4004-y

    authors: Samora M,Teixeira AL,Sabino-Carvalho JL,Vianna LC

    更新日期:2019-01-01 00:00:00

  • Effects of exercise stress on the endocannabinoid system in humans under field conditions.

    abstract::The effects of physical exercise stress on the endocannabinoid system in humans are almost unexplored. In this prospective study, we investigated in a crossover design and under field conditions at different altitudes the effects of physical exercise on the endocannabinoid system (ECS) in 12 trained healthy volunteers...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-011-2237-0

    authors: Feuerecker M,Hauer D,Toth R,Demetz F,Hölzl J,Thiel M,Kaufmann I,Schelling G,Choukèr A

    更新日期:2012-07-01 00:00:00

  • Muscle alterations induced by electrostimulation are lower at short quadriceps femoris length.

    abstract:PURPOSE:This study aimed at determining through MRI investigations, force and soreness assessments whether the modulation of muscle length is a relevant strategy for minimising neuromuscular electrical stimulation (NMES)-induced muscle damage in young healthy participants. METHODS:Comparison of 2 NMES sessions (40 iso...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-019-04277-5

    authors: Fouré A,Ogier AC,Guye M,Gondin J,Bendahan D

    更新日期:2020-02-01 00:00:00

  • High-load resistance exercise with superimposed vibration and vascular occlusion increases critical power, capillaries and lean mass in endurance-trained men.

    abstract:PURPOSE:It is a widely accepted premise in the scientific community and by athletes alike, that adding resistance exercise to a regular regimen of endurance training increases endurance performance in endurance-trained men. However, critical power (CP), capillarization, and myofiber size remain unaffected by this addit...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-013-2752-2

    authors: Mueller SM,Aguayo D,Lunardi F,Ruoss S,Boutellier U,Frese S,Petersen JA,Jung HH,Toigo M

    更新日期:2014-01-01 00:00:00

  • Effects of isolated locomotor muscle fatigue on pacing and time trial performance.

    abstract:PURPOSE:Locomotor muscle fatigue impairs exercise performance during time to exhaustion tests. However, its effect on self-regulation of power output (pacing) is unknown. The primary aim of this study was to investigate the effects of locomotor muscle fatigue on pacing and time trial performance. METHODS:Ten healthy r...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-013-2673-0

    authors: de Morree HM,Marcora SM

    更新日期:2013-09-01 00:00:00

  • Measurement frequency influences the rating of perceived exertion during sub-maximal treadmill running.

    abstract::To examine the influence of the frequency of measurement on the rating of perceived exertion (RPE) during sub-maximal exercise. On two occasions participants performed 35 min sub-maximal treadmill exercise at the same running speed. In both runs RPE was measured after 5 min. Thereafter, RPE was measured at either 10-m...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-009-1041-6

    authors: Corbett J,Vance S,Lomax M,Barwood MJ

    更新日期:2009-05-01 00:00:00

  • Maximal aerobic power and anaerobic capacity in cycling across the age spectrum in male master athletes.

    abstract:PURPOSE:We analyzed the best performance times of master cycling athletes in the 200-3000 m track competitions to estimate the decay of maximal aerobic power (MAP) and anaerobic capacity (AnS) with aging. METHODS:In various decades of age (30-80 years), MAP and AnS were estimated using an iterative procedure as the va...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-016-3396-9

    authors: Capelli C,Rittveger J,Bruseghini P,Calabria E,Tam E

    更新日期:2016-07-01 00:00:00

  • Changes in interstitial noradrenaline, trapezius muscle activity and oxygen saturation during low-load work and recovery.

    abstract::Both physical as well as mental demands result in an increased activity in the sympathetic nervous system (SNS) with changes in blood-pressure and heart-rate. Through local release of catecholamines, e.g. noradrenaline (NAd) SNS exerts various actions at the muscle level. The aims of this study were to investigate the...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-009-1095-5

    authors: Flodgren GM,Crenshaw AG,Gref M,Fahlström M

    更新日期:2009-09-01 00:00:00

  • Relationship between breath-hold time and physical performance in patients with cystic fibrosis.

    abstract::Rehabilitation including physiotherapy is an important part of the treatment used to help improve the quality of life of patients with cystic fibrosis (CF). The aim of this study was to determine the value of the breath-hold time as an index of exercise tolerance in patients with CF. Eighteen patients in different sta...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-005-1350-3

    authors: Barnai M,Laki I,Gyurkovits K,Angyan L,Horvath G

    更新日期:2005-10-01 00:00:00

  • Oxygen availability affects exercise capacity, but not neuromuscular fatigue characteristics of knee extensors, during exhaustive intermittent cycling.

    abstract:PURPOSE:To compare the effects of different hypoxia severities on exercise capacity, cardio-respiratory, tissue oxygenation and neuromuscular fatigue characteristics in response to exhaustive intermittent cycling. METHODS:Eleven well-trained cyclists, repeated supra-maximal cycling efforts of 15 s (30% of anaerobic po...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-020-04495-2

    authors: Girard O,Buchheit M,Goodall S,Racinais S

    更新日期:2021-01-01 00:00:00

  • The acute effect of Quercetin on muscle performance following a single resistance training session.

    abstract:PURPOSE:To examine the effect of acute quercetin (Q) ingestion on neuromuscular function, biomarkers of muscle damage, and rate of perceived exertion (RPE) in response to an acute bout of resistance training. METHODS:10 young men (22.1 ± 1.8 years, 24.1 ± 3.1 BMI) participated in a randomized, double-blind, crossover ...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-018-3834-y

    authors: Patrizio F,Ditroilo M,Felici F,Duranti G,De Vito G,Sabatini S,Sacchetti M,Bazzucchi I

    更新日期:2018-05-01 00:00:00

  • Regional differences in facial skin blood flow responses to thermal stimulation.

    abstract:PURPOSE:The facial skin blood flow (SkBF) shows regional differences in the responses to a given stimulation. The facial SkBFs, especially in the eyelid and nose exhibit unique response to physiological and psychological stimuli, but the mechanisms inducing those regional differences remain unclear. To investigate whet...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-019-04109-6

    authors: Miyaji A,Hayashi S,Hayashi N

    更新日期:2019-05-01 00:00:00

  • Respiratory sinus arrhythmia stabilizes mean arterial blood pressure at high-frequency interval in healthy humans.

    abstract:PURPOSE:Arterial blood pressure variations are an independent risk factor for end organ failure. Respiratory sinus arrhythmia (RSA) is a sign of a healthy cardiovascular system. However, whether RSA counteracts arterial blood pressure variations during the respiratory cycle remains controversial. We restricted normal R...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-014-3042-3

    authors: Elstad M,Walløe L,Holme NL,Maes E,Thoresen M

    更新日期:2015-03-01 00:00:00

  • Temporal dynamics of the circadian heart rate following low and high volume exercise training in sedentary male subjects.

    abstract:PURPOSE:Increased risk of arrhythmic events occurs at certain times during the circadian cycle with the highest risk being in the second and fourth quarter of the day. Exercise improves treatment outcome in individuals with cardiovascular disease. How different exercise protocols affect the circadian rhythm and the ass...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-015-3185-x

    authors: Jelinek HF,Karmakar C,Kiviniemi AM,Hautala AJ,Tulppo MP,Mäkikallio TH,Huikuri HV,Khandoker AH,Palaniswami M

    更新日期:2015-10-01 00:00:00

  • Acute cardiovascular autonomic responses to inhaled particulates.

    abstract:PURPOSE:Harmful effects of inhaled particulates have been established in epidemiologic studies of ambient air pollution. In particular, heart rate variability responses to high levels of environmental tobacco smoke (ETS), similar to responses observed during direct smoking, have been reported. We sought to determine wh...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-014-2998-3

    authors: Evans JM,Jenkins RA,Ilgner RH,Knapp CF,Zhang Q,Patwardhan AR

    更新日期:2015-02-01 00:00:00

  • An Ironman triathlon reduces neuromuscular performance due to impaired force transmission and reduced leg stiffness.

    abstract:PURPOSE:An Ironman triathlon is associated with changes in body composition as well as decreases in neuromuscular function. While the changes in body composition occurring during an Ironman are well investigated, comprehensive data on the changes in neuromuscular performance are scarce. In the present study, we investi...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-014-3051-2

    authors: Mueller SM,Knechtle P,Knechtle B,Toigo M

    更新日期:2015-04-01 00:00:00

  • O2 uptake and muscle deoxygenation kinetics during the transition to moderate-intensity exercise in different phases of the menstrual cycle in young adult females.

    abstract::O(2) uptake (VO2) kinetics were examined during the follicular (F) and luteal (L) phases of the menstrual cycle to determine if there was an effect of altered sex hormones on the (VO2) response to moderate-intensity exercise. Seven healthy women (age 21 +/- 2 years; mean +/- SD) performed six transitions from 20 W to ...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-007-0505-9

    authors: Gurd BJ,Scheid J,Paterson DH,Kowalchuk JM

    更新日期:2007-10-01 00:00:00

  • Differences in metabolic and inflammatory responses in lower and upper body high-intensity intermittent exercise.

    abstract:PURPOSE:The purpose of this study was to compare the effect of upper and lower body high-intensity intermittent exercise (HIIE) on immunometabolism profile. METHODS:Seven male judo athletes completed two experimental sessions separated by at least 48 h. The athletes completed four bouts of the upper and lower body Win...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-015-3127-7

    authors: Lira FS,Panissa VL,Julio UF,Franchini E

    更新日期:2015-07-01 00:00:00

  • Peak and submaximal steady-state metabolic and cardiorespiratory responses during arm-powered and arm-trunk-powered handbike ergometry in able-bodied participants.

    abstract::The purpose of this study was to compare the peak and submaximal metabolic and cardiorespiratory responses during steady-state arm-powered (AP) and arm-trunk-powered (ATP) handbike ergometry. Twelve male able-bodied participants with no prior experience in handcycling completed a maximal progressive incremental test a...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-011-2051-8

    authors: Verellen J,Meyer C,Janssens L,Vanlandewijck Y

    更新日期:2012-03-01 00:00:00

  • Factors to consider when assessing diurnal variation in sports performance: the influence of chronotype and habitual training time-of-day.

    abstract:PURPOSE:The aim of this study was to compare morning and evening time-trial performance, RPE and mood state of trained swimmers, taking into account chronotype, habitual training time-of-day and PERIOD3 (PER3) variable number tandem repeat genotype. METHODS:Twenty-six swimmers (18 males, age: 32.6 ± 5.7 years) swam 20...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-015-3109-9

    authors: Rae DE,Stephenson KJ,Roden LC

    更新日期:2015-06-01 00:00:00

  • Multiple short bouts of exercise are better than a single continuous bout for cardiometabolic health: a randomised crossover trial.

    abstract:PURPOSE:To compare cardiometabolic responses to five consecutive days of daily postprandial exercise accumulated in three 10-min bouts or a single 30-min bout to a no-exercise control. METHODS:Ten insufficiently active adults completed three trials in a randomised order. Each trial comprised five consecutive days of 3...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-020-04461-y

    authors: Shambrook P,Kingsley MI,Taylor NF,Wundersitz DW,Wundersitz CE,Gordon BA

    更新日期:2020-11-01 00:00:00

  • Sedentary patterns are associated with BDNF in patients with type 2 diabetes mellitus.

    abstract:PURPOSE:Exercise is beneficial to type-2 diabetes-mellitus (T2DM), and there is evidence showing that one of those benefits include a higher expression of brain-derived neurotrophic factor (BDNF), which has been implicated in improving fat oxidation and cognitive development. The deleterious effect of prolonged sedenta...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-020-04568-2

    authors: Júdice PB,Magalhães JP,Hetherington-Rauth M,Correia IR,Sardinha LB

    更新日期:2021-01-02 00:00:00

  • Energy system contribution during competitive cross-country skiing.

    abstract::Energy system contribution during cross-country (XC) skiing races is dependent on several factors, including the race duration, track profile, and sub-techniques applied, and their subsequent effects on the use of the upper and lower body. This review provides a scientific synopsis of the interactions of energy system...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,评审

    doi:10.1007/s00421-019-04158-x

    authors: Losnegard T

    更新日期:2019-08-01 00:00:00

  • Two methods for determining plasma IL-6 in humans at rest and following exercise.

    abstract::We compared two methods to determine IL-6 at rest and following exercise. On two occasions, plasma IL-6 was determined in 10 men and 13 women before and immediately following 90 min of cycling at 65% V(O)(2max) using a cytometric bead array (CBA) and an ELISA. The CBA detected IL-6 in 63% of pre-exercise samples and 8...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章

    doi:10.1007/s00421-008-0866-8

    authors: Timmons BW,Hamadeh MJ,Tarnopolsky MA

    更新日期:2009-01-01 00:00:00

  • Effect of body tilt angle on fatigue and EMG activities in lower limbs during cycling.

    abstract::This study compared the rate of fatigue and lower limb EMG activities during high-intensity constant-load cycling in upright and supine postures. Eleven active males performed seven cycling exercise tests: one upright graded test, four fatigue tests (two upright, two supine) and two EMG tests (one upright, one supine)...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-009-1254-8

    authors: Egaña M,Ryan K,Warmington SA,Green S

    更新日期:2010-03-01 00:00:00

  • Endurance training modifies exercise-induced activation of blood coagulation: RCT.

    abstract::Randomized controlled trials (RCTs) on the topic of physical training and blood coagulation are rare and the effects are unclear. The aim of this study was to investigate whether endurance training adjusts blood coagulation and fibrinolysis at rest and after exercise. The study included 50 healthy untrained non-smoker...

    journal_title:European journal of applied physiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1007/s00421-012-2564-9

    authors: Hilberg T,Menzel K,Wehmeier UF

    更新日期:2013-06-01 00:00:00