scholarly journals Reliability of a Cycle Sprint Test to Measure Lower Limb Muscle Power

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Edmondston SJ ◽  
◽  
Gibbons R ◽  
Mackie KE ◽  
Haywood Z ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Average Power ◽  
Power Measurement ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Rehabilitation Outcomes ◽  
Asymptomatic Volunteers ◽  
Standard Error Of Measurement ◽  
Error Of Measurement

This study examined the reliability of a cycle sprint test for measuring lower limb muscle power. Twenty asymptomatic volunteers completed the test on two occasions, with one week between test sessions. Participants sat on a stationary road bicycle with commercial power meters in the pedal cranks. Maximum and average muscle power was measured during three, 10-second sprint efforts. The test demonstrated excellent within- and between-day reliability for both maximum and average power measurement (ICC=0.93 to 0.97). The within-day Standard Error of Measurement (SEM) was between 25.9W (6.1%) and 35.1W (8.5%), and 24.8 (6.5%) and 28.6W (7.7%) for maximum and average power respectively. The between-day SEM was 34.3W (7.8%) for maximum power and 26.4W (7.1%) for average power. Reliability of the cycle sprint test has been established, along with thresholds for significant change. The cycle sprint test may have relevance in clinical populations to evaluate lower limb muscle power following injury, or to measure rehabilitation outcomes.

scholarly journals Age-Related Declines in Lower Limb Muscle Function are Similar in Power and Endurance Athletes of Both Sexes: A Longitudinal Study of Master Athletes

2021 ◽  
Author(s):  
Alex Ireland ◽  
Uwe Mittag ◽  
Hans Degens ◽  
Dieter Felsenberg ◽  
Ari Heinonen ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Function ◽  
Peak Power ◽  
Muscle Power ◽  
Endurance Athletes ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Master Athletes ◽  
Cross Sectional ◽  
Age Related

AbstractThe age-related decline in muscle function, particularly muscle power, is associated with increased risk of important clinical outcomes. Physical activity is an important determinant of muscle function, and different types of physical activity e.g. power-based versus endurance-based exercise appear to have differential effects on muscle power. Cross-sectional studies suggest that participation in power-based exercise is associated with greater muscle power across adulthood but this has not been investigated longitudinally. We recruited eighty-nine male and female power and endurance master athletes (sprint and distance runners respectively, baseline age 35–90y). Using jumping mechanography, we measured lower limb muscle function during a vertical jump including at least two testing sessions longitudinally over 4.5 ± 2.4y. We examined effects of time, discipline (power/endurance) and sex in addition to two- and three-way interactions using linear mixed-effects models. Peak relative power, relative force and jump height, but not Esslingen Fitness Index (indicating peak power relative to sex and age-matched reference data) declined with time. Peak power, force, height and EFI were greater in power than endurance athletes. There were no sex, discipline or sex*discipline interactions with time for any variable, suggesting that changes were similar over time for athletes of both sexes and disciplines. Advantages in lower limb muscle function in power athletes were maintained with time, in line with previous cross-sectional studies. These results suggest that improvements in lower limb function in less active older individuals following power-based training persist with continued adherence, although this requires further investigation in interventional studies.

scholarly journals Plyo-Accentuated Eccentric Loading Methods to Enhance Lower Limb Muscle Power

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Matthew J. Handford ◽  
Fernando Martín Rivera ◽  
Sergio Maroto-Izquierdo ◽  
Jonathan D. Hughes
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Loading Methods

Lower Limb Muscle Power Relationships in Bilateral Able-Bodied Gait

2001 ◽  
Vol 80 (11) ◽  
pp. 821-830 ◽  
Author(s):  
Heydar Sadeghi ◽  
Somayeh Sadeghi ◽  
Paul Allard ◽  
Hubert Labelle ◽  
Morris Duhaime
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Power Relationships ◽  
Lower Limb Muscle ◽  
Limb Muscle

Short-Term Effects of Rolling Massage on Energy Cost of Running and Power of the Lower Limbs

2018 ◽  
Vol 13 (10) ◽  
pp. 1337-1343 ◽  
Author(s):  
Nicola Giovanelli ◽  
Filippo Vaccari ◽  
Mirco Floreani ◽  
Enrico Rejc ◽  
Jasmine Copetti ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Statistical Significance ◽  
Lower Limbs ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Maximal Power ◽  
Endurance Running ◽  
Running Performance ◽  
And Control

Purpose: Self-myofascial release (SMFR) is a type of self-massage that is becoming popular among athletes. However, SMFR’s effects on running performance have not yet been investigated. The aim of this study was to evaluate the effects of SMFR on the cost of running (Cr). In addition, the authors evaluated the effects of SMFR on lower-limb muscle power. Methods: Cr and lower-limb muscle power during squat jump (SJ) and countermovement jump (CMJ) were measured before (PRE), immediately after (POST), and 3 h after (POST 3h) an SMFR protocol (experimental condition). In the control-condition testing session, the same measurements were performed without undergoing the SMFR protocol. Experimental and control conditions were tested in a randomized order. Results: Cr at POST trended to increase compared with PRE (+6.2% [8.3%], P = .052), whereas at POST 3h, Cr was restored to PRE values (+0.28% [9.5%], P = .950). In the experimental condition, no significant effect of time was observed for maximal power exerted during SJ. By contrast, maximal power exerted during CMJ at POST and at POST 3h was significantly higher than that observed at PRE (+7.9% [6.3%], P = .002 and +10.0% [8.7%], P = .004, respectively). The rate of force development measured during CMJ also increased after SMFR, reaching statistical significance at 200 ms from force onset at POST 3h (+38.9%, P = .024). Conclusions: An acute use of foam rollers for SMFR performed immediately prior to running may negatively affect endurance running performance, but its use should be added before explosive motor performances that include stretch-shortening cycles.

scholarly journals Log-linear Adjusted Lower Limb Muscle Power of Boys and Girls

2002 ◽  
Vol 8 (2) ◽  
pp. 67-71
Author(s):  
Michael CHIA ◽  
Jin Jong QUEK
Keyword(s):  
Muscle Mass ◽  
Body Mass ◽  
Lower Limb ◽  
Muscle Power ◽  
Lower Limbs ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Wingate Anaerobic Test ◽  
Log Linear ◽  
Anaerobic Test

LANGUAGE NOTE | Document text in English; abstract also in Chinese.The study investigated the log-linear muscle power of the lower limbs in a group of 13 to 14 year old boys and girls. Participants were 48 boys (stature: 1.69±0.05m; body mass: 57.9±11.8kg; lower limb muscle mass: 16.4±2.5kg) and 38 girls (stature: 1.59±0.06m; body mass: 57.7±7.6kg; lower limb muscle mass: 12.5±1.2kg). Lower limb muscle mass (LLMM) was determined using a dual energy X-ray absorptiometric (DEXA) procedure. Participants completed a 30s Wingate Anaerobic Test (WAnT) where peak power (PP) and mean power (MP) were expressed in relation to LLMM using log-linear adjustment procedures. Boys and girls had similar log-linear adjusted PP (495W vs. 488W, p>0.05) and MP (423W vs. 422W, p>0.05) when they were expressed in relation to LLMM. However, common b exponents that defined the allometric relationship between PP and MP, and LLMM in both boys and girls were 1.26 (SE 0.15), and 1.21 (SE 0.15), respectively. These were markedly different from the b exponent of 1.0 used in the ratio standard, or the 0.67 value predicted from geometric similarity theory. Despite a similar interpretation of data (i.e. no sex difference in lower limb muscle power in boys and girls) using either allometric modeling, allometric modeling of sample-specific exercise data is recommended to produce an appropriate size-independent variable, to allow appropriate comparisons in performance between boys and girls.本文以對數一線性修正法對13 — 14歲少年下肢力量進行了研究。測試對象為48名男孩(身高為1.69 ± 0.05米，體重為57.9 ± 11.8公斤，下肢去脂體重為16.4 ±2.5公斤）和38名女孩(身高為1.59 ± 0.06米，體重為57.7 ± 7.6公斤，下肢去脂體重為12.5 ± 1.2公斤）。以雙光能X光吸收儀(DEXA)測定受試者下肢的去脂體重。受試對象在自行車功率儀上完成30秒溫蓋特無氧功率測試 (Wingate Anaerobic Test, WAnT)，以對數-線性修正法表示最高功率和平均功率與下肢去脂體重的關係。其結果顯不，男孩與女孩的最高功率分別為495瓦與488瓦(p>0.05)，平均功率分別為423瓦與422瓦(p>0.05)。根據對數-線性修正法所得的最高功率和平均功率與下肢去脂體重關係的b指數分別1.26 (SE為0.15)與1.21 (SE為0.15)，男女相同。此結果與常用標準比b指數為1，或應用幾何相似理論推測值0.67等方法所得的結果明顯不同。應用異速生長模型(對數-線性修正法)可測得與其實驗對象和運動形式相適應的形態機體指標，因而可較正確地比較少年男女之間的運動能力。

scholarly journals Upper and Lower Limb Muscle Power Relationships in Mobility-Limited Older Adults

2005 ◽  
Vol 60 (4) ◽  
pp. 476-480 ◽  
Author(s):  
S. Herman ◽  
D. K. Kiely ◽  
S. Leveille ◽  
E. O'Neill ◽  
S. Cyberey ◽  
...  
Keyword(s):  
Older Adults ◽  
Lower Limb ◽  
Muscle Power ◽  
Power Relationships ◽  
Lower Limb Muscle ◽  
Limb Muscle

scholarly journals Tolerance of an Aquatic Power Training Program by Older Adults with Symptomatic Knee Osteoarthritis

Arthritis ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Neil A. Segal ◽  
Robert Wallace
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Power Training ◽  
Limb Function ◽  
Knee Oa ◽  
Symptomatic Knee Osteoarthritis ◽  
Symptomatic Knee ◽  
Lower Limb Function

Objective. To determine the tolerance and feasibility of aquatic-based power training for improving lower limb muscle power, impairments, and mobility in adults with symptomatic knee OA. Participants. Twenty-nine adults, age 50 years and over, with symptomatic knee OA (ACR clinical criteria) and mobility limitation (400-meter walk time slower than median for sex and decade) completed 45-minute aquatic power training sessions twice weekly for 6 weeks. Main Outcome Measurements. Prospective outcomes included tolerance of the program, as well as change in stair climb power, 400-meter walk time, overall and knee-specific pain, activities of daily living (ADL), quality of life (QOL), and lower limb function at 6- and 12-week follow-up. Results. The training intensity required modification for 9 of the 29 participants. Lower limb muscle power, ADL, QOL, and overall pain were improved immediately and 6 weeks following completion (all ). However, 400-meter walk times, and lower limb function did not differ from baseline. Conclusions. A 6-week aquatic rehabilitation program appears to be well tolerated by adults with symptomatic knee OA with mobility limitations and may result in improved lower limb muscle power, symptoms, ADL, and QOL. However, this intervention may have insufficient specificity or intensity for improving physical function.

scholarly journals Comparison between static and dynamic warm-up exercise regimes on lower limb muscle power

Health ◽  
2009 ◽  
Vol 01 (02) ◽  
pp. 117-120 ◽  
Author(s):  
Jose Shelton ◽  
G. V. Praveen Kumar
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Warm Up
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