Ruth Burstein

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The present study was undertaken to examine the energy cost of prolonged walking while carrying a backpack load. Six trained subjects were tested while walking for 120 min on a treadmill at a speed of 1.25 m · s−1 and 5% elevation with a well fitted backpack load of 25 and 40 kg alternately. Carrying 40 kg elicited a significantly higher (p<0.01) enery cost(More)
The purpose of this study was to determine the effect of caffeine ingestion on physical performance after prolonged endurance exercise. Twenty three trained male volunteers participated in a 40-km march and were divided into two groups, matched for caffeine clearance rate and aerobic capacity. The experimental group ingested, prior to the march, a(More)
Physical performance deteriorates during strenuous exercise as manifested by a decrease in maximal aerobic power and increased activity of serum muscle enzymes. The relationship between these parameters was investigated in 41 trained subjects during 24 h marches and the following recovery period. Peak O2 uptake and serum activity of creatine phosphokinase(More)
The effect of an imposed drinking discipline versus ad libitum drinking was studied on 21 healthy, well-trained volunteers, during a continuous 4.5-h march at an altitude of 1,700 m and an ambient temperature of 0° C, SD 1. Group I (n = 13) was instructed to drink 250 ml of warmed, artificially sweetened fluid every 30 min, whereas group II (n = 8) drank(More)
Antibiotic treatment tends sometimes to result in sensations of fatigue and decreased physical performance. The effects of antibiotics were therefore studied in 50 healthy, male trainees, aged 18–25 years, assigned in a random, double-blind fashion to one of the following treatments: tetracycline, ampicillin, trimethoprim/sulphamethoxazole, placebo I and(More)
Sixteen male subjects [18–21 years, maximal oxygen consumption $$(\dot V_{O_{_2 } } )$$ = 59.2 ml · kg−1 min−1 ± SEM 5.6] participated in a study to evaluate the effect of prolonged, complete food deprivation combined with physical effort, on plasma lipoprotein concentrations. The subjects were deprived of food for 81 h but were supplied with water: they(More)
Objective: To investigate a long-term colchicine treatment in inhibiting normal release of insulin, in response to a glucose load. Setting: The Heller Institute of Medical Research, Sheba Medical Center, Tel-Hashomer. Patients: Thirty-one familial Mediterranean fever (FMF) patients, treated continuously with colchicine (1.0–2.0 mg · day–1) for 2–13 years.(More)
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