Repeated Sprint Performances among Girls and Women

LANGUAGE NOTE | Document text in English; abstract also in Chinese.The aim of the study was to compare between girls and women, the recovery of Wingate Anaerobic Test (WAnT) power after two prior sprints of 15-seconds' duration with a short active recovery interval in-between the sprints. Participants with written informed consent were 19 girls (age: 13.6±1.0yrs; body mass: 51.2±7.6kg & stature: 1.59±0.06m) and 21 women (age: 25.1±2.7yrs; body mass: 57.9±7.7kg & stature: 1.61±0.05m). Lower limb muscle mass was determined using a Dual-energy X-ray Absorptiometric (DXA) procedure. Following a standardized warm-up, each participant completed a series of three 15-second WAnTs, with each test separated by a 45-second active recovery interval. WAnT power variables were computed over 1-second time periods and were corrected for the inertia of the cycle ergometer (Monark 834E). Whole blood lactate concentrations (BL) were obtained immediately post warm-up and at three minutes after the completion of the third WAnT. Peak power (PP), expressed in watts per lower limb muscle mass (W. kg -1LLMM) were significantly greater in women than in girls in the first 15s WAnT (46.1±10.9 vs 37.4±2.3W.kg -1LLMM, p0.05). Girls were better able to replicate their power achieved in the first WAnT, in the third WAnT than women (mean of the differences ± standard deviation of the differences for PP: 84±47W vs 174±84W; MP: 81±45W vs 161+65W, p0.05), and at three minutes post exercise (9.2±1.2 vs. 8.4±1.3 mM.L-1, p >0.05) were not significantly different in girls and women.本文以溫蓋特無氧功率試驗(Wingate Anaerobic Test, WAnT)為研究方法，重複測定了少女和婦女15秒的無氧功率，旨在比較少女與婦女之間的無氧能力極其恢復。受試對象為19名少女(年齡：13.6±1.0歲；體重：51.2±7.6公斤；身高：1.59±0.06米）和21名婦女（年齡:25.1±2.7歲；體重：57.9±7.7公斤；身高：1.61±0.05米）。以雙光能X光吸收儀(DXA)測定受試者下肢的瘦體重。在標準化的準備活動之後，受試者在自行車測功儀(Monark 834E)上完成3次15秒最快速度的踏車運動，各次運動之間以45秒的活動性休息為間隔。在準備活動後即刻和第三次運動試驗后3分鐘采血測定血乳酸濃度。在首次15秒WAnT測試中，婦女組的最高功率(46.1±10.9瓦．公斤下肢瘦體重-1)明顯高于少女組(37.4±2.3瓦．公升-1肢瘦體重-1，p0.05)。第三次15秒運動試驗中，少女組的無氧功率明顯地較婦女組接近第一次WAnT測試中所達到的功率(p0.05)，分別為2.5±0.5毫克分子．升-1與1.9±0.5毫克分子．升-1及9.2±1.2毫克分子．升-1與8.4±1.3毫克分子．升-1。

Download Full-text

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

Asian Journal of Physical Education & Recreation ◽

10.24112/ajper.81273 ◽

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。

Download Full-text