scholarly journals The Relationship between Sit-to-stand Frequency and Anaerobic Threshold Determined by Cycle Ergometer

2011 ◽  
Vol 23 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Satomi Kamimura ◽  
Sumikazu Akiyama
Keyword(s):  
Anaerobic Threshold ◽  
Cycle Ergometer ◽  
Sit To Stand ◽  
The Relationship

Determination of the anaerobic threshold by a noninvasive field test in runners

1982 ◽  
Vol 52 (4) ◽  
pp. 869-873 ◽  
Author(s):  
F. Conconi ◽  
M. Ferrari ◽  
P. G. Ziglio ◽  
P. Droghetti ◽  
L. Codeca
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Field Test ◽  
Anaerobic Threshold ◽  
Initial Velocity ◽  
Running Speed ◽  
The Relationship

The relationship between running speed (RS) and heart rate (HR) was determined in 210 runners. On a 400-m track the athletes ran continuously from an initial velocity of 12–14 km/h to submaximal velocities varying according to the athlete's capability. The HRs were determined through ECG. In all athletes examined, a deflection from the expected linearity of the RS-HR relationship was observed at submaximal RS. The test-retest correlation for the velocities at which this deflection from linearity occurred (Vd) determined in 26 athletes was 0.99. The velocity at the anaerobic threshold (AT), established by means of blood lactate measurements, and Vd were coincident in 10 runners. The correlation between Vd and average running speed (mean RS) in competition was 0.93 in the 5,000 m (mean Vd = 19.13 +/- 1.08 km/h; mean RS = 20.25 +/- 1.15 km/h), 0.95 in the marathon (mean Vd = 18.85 +/- 1.15 km/h; mean RS = 17.40 +/- 1.14 km/h), and 0.99 in the 1-h race (mean Vd = 18.70 +/- 0.98 km/h; mean RS = 18.65 +/- 0.92 km/h), thus showing that AT is critical in determining the running pace in aerobic competitive events.

scholarly journals The Relationship between the Power Index of the Sit-to-Stand Test and Muscle Function of Isokinetic Knee Extension in Healthy Young Adults

2012 ◽  
Vol 27 (2) ◽  
pp. 119-122
Author(s):  
Tetsuo TAKAHATA ◽  
Chiaki YAGURA ◽  
Shinichiro OKA ◽  
Takeshi SOTA ◽  
Takahiko YAMAMOTO
Keyword(s):  
Young Adults ◽  
Muscle Function ◽  
Power Index ◽  
Knee Extension ◽  
Stand Test ◽  
Sit To Stand ◽  
The Relationship

The Relationship Between Different Body Mass Index Categories and Chair Rise Performance in Adult Women

2013 ◽  
Vol 29 (6) ◽  
pp. 705-711 ◽  
Author(s):  
Stefan Schmid ◽  
Stéphane Armand ◽  
Zoltan Pataky ◽  
Alain Golay ◽  
Lara Allet
Keyword(s):  
Adult Women ◽  
Life Activity ◽  
Obese People ◽  
Stand Test ◽  
Sit To Stand ◽  
Severely Obese ◽  
Obese Subjects ◽  
Chair Rise ◽  
The Relationship ◽  
Overweight Subjects

An important prerequisite to carry out daily activities is the sit-to-stand movement. However, in obese people, this movement is characterized by altered biomechanics, which might lead to daily life activity impairments. The aim of this study was to investigate whether there are differences in kinetic and kinematic variables between three different BMI categories when performing a specific sit-to-stand test. Thirty-six adult women (BMI = 17–45 kg/m2) performed the sit-to stand test five times consecutively and as quickly as possible. Analyses of variance were used to determine differences between three BMI groups (normal or overweight: BMI < 30 kg/m2; obese: 30 ≤ BMI < 35; severely obese: BMI ≥ 35). Peak and mean vertical sacrum velocity indicated a decrease in severely obese subjects. Obese and severely obese individuals did not show higher fatigue over the five consecutive movements. Peak force and rate of force development decreased in normal or overweight subjects. The ability to successfully complete the test decreased with a higher BMI, probably due to a reduced ability to rapidly generate a high force.

scholarly journals The relationship between energy cost and the center of gravity trajectory during sit-to-stand motion

2015 ◽  
Vol 27 (12) ◽  
pp. 3883-3886 ◽  
Author(s):  
Hiroyuki Fujisawa ◽  
Hiroto Suzuki ◽  
Kenichi Murakami ◽  
Shingo Kawakami ◽  
Makoto Suzuki
Keyword(s):  
Energy Cost ◽  
Center Of Gravity ◽  
Sit To Stand ◽  
The Relationship

Anaerobic threshold alterations caused by endurance training in middle-aged men

1979 ◽  
Vol 46 (6) ◽  
pp. 1039-1046 ◽  
Author(s):  
J. A. Davis ◽  
M. H. Frank ◽  
B. J. Whipp ◽  
K. Wasserman
Keyword(s):  
Endurance Training ◽  
Anaerobic Threshold ◽  
Minute Ventilation ◽  
Correlation Coefficients ◽  
Cycle Ergometer ◽  
Work Rate ◽  
Middle Aged ◽  
Co2 Output ◽  
Before And After ◽  
Cycle Endurance

Nine previously sedentary middle-aged males underwent cycle endurance training 45 min/day for 9 wk with an average attendance of 4.1 days/wk. Seven males served as controls. Before and after the training period, the subjects performed three cycle ergometer tests. Work rate was incremented by 15 W/min, to the limit of the subjects' tolerance, in the first two tests; the third test consisted of contant-load cycling at an O2 uptake (VO2) just below the pretraining anaerobic threshold (AT). After training, the AT increased significantly by 44%, expressed as absolute VO2, and by 15%, expressed relative to VO2 max. Significant increases were also noted in VO2max (25%), maximal minute ventilation (19%), and maximal work rate (28%). The test-retest correlation coefficients for the AT (%VO2max) were 0.91, pre- and posttraining. Training did not alter steady-state VO2 during the submaximal exercise test whereas significant decreases occurred in CO2 output, VE, respiratory quotient, and VE/VO2. No changes occurred in the control subjects during this period. These results demonstrate that the AT is profoundly influenced by endurance training in previously sedentary middle-aged males.

Factors contributing to increased muscle fatigue with β-blockers

1991 ◽  
Vol 69 (2) ◽  
pp. 254-261 ◽  
Author(s):  
R. S. McKelvie ◽  
N. L. Jones ◽  
G. I. F. Heigenhauser
Keyword(s):  
Muscle Fatigue ◽  
Exercise Performance ◽  
Cycle Ergometer ◽  
Metabolic Effects ◽  
High Dose ◽  
Exercise Tests ◽  
Significant Difference ◽  
Ergometer Exercise ◽  
The Relationship ◽  
Male Subjects

β-Adrenoceptor blockers are widely used clinically and can be classified as nonselective (β1 and β2) or selective (β1). Impairment of exercise performance is a well-known side effect of this group of drugs. This paper reviews mechanisms that could potentially be responsible for this impairment. In addition to cardiovascular and metabolic effects, β -blockade inhibits Na+–K+ ATPase pumps controlling ion movement between muscle and plasma and thus may contribute to muscle fatigue through this mechanism. To investigate the relationship between the change in plasma [K+] and exercise performance, we studied healthy male subjects taking propranolol. Eight subjects performed maximal incremental cycle ergometer exercise tests during control (no drug), low dose (LD) (40 mg daily), and high dose (HD) (265 ± 4.3 (SE) mg daily) of propranolol. The control plasma [K+] (5.8 ± 0.12 mequiv./L) during exercise was significantly lower than either the LD (6.4 ± 0.05 mequiv./L) or HD (6.1 ± 0.16 mequiv./L) values. There was no significant difference between plasma [K+] for the LD and HD of propranolol. However, maximum oxygen uptake was reduced only while taking the HD of propranolol. Six of the subjects also performed three 30-s bouts of high intensity exercise on an isokinetic cycle ergometer while taking the LD and HD of propranolol. There was no significant difference between doses for the increase in plasma [K+] (LD, 7.8 ± 0.35 mequiv./L vs. HD, 7.6 ± 0.36 mequiv./L) during exercise. However, exercise performance was significantly reduced during HD compared with LD. These results suggest that the increases in plasma [K+] with propranolol did not play a direct significant role in the reduced performance observed during the HD.Key words: exercise, potassium, performance, lactate.

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