Gradual and rapid weight loss
| Autor: | Risto Koskinen, Tuomo Rankinen, Inkeri Ruokonen, G M Fogelholm, Juha Laakso |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Male
Gerontology Time Factors Riboflavin Weight Gain medicine.disease_cause Eating 0302 clinical medicine Jumping Weight loss Magnesium Nutritional Physiological Phenomena Orthopedics and Sports Medicine Minerals Pyridoxine Vitamins Glutathione Reductase Transketolase medicine.symptom Anaerobic exercise Martial Arts Sports medicine.drug Adult Adolescent Diet Reducing Ergometry Drinking Nutritional Status 030209 endocrinology & metabolism Physical Therapy Sports Therapy and Rehabilitation 03 medical and health sciences Animal science Weight Loss Dietary Carbohydrates medicine Humans Aspartate Aminotransferases Wrestling Wingate test Water Deprivation business.industry 030229 sport sciences Nutrition Assessment Blood chemistry Physical Fitness Energy Intake Energy Metabolism Food Deprivation business Weight gain Psychomotor Performance |
| Zdroj: | University of Helsinki |
| ISSN: | 0195-9131 |
| DOI: | 10.1249/00005768-199303000-00012 |
| Popis: | We studied seven male wrestlers and three judo athletes (weight 55-93 kg) during two weight reductions. In the "gradual" procedure (GP), a 5.0 +/- 0.4% (mean +/- SEM) weight loss was achieved in 3 weeks by energy restriction. In the "rapid" procedure (RP), 6.0 +/- 0.6% of body weight was lost in 2.4 days by fluid and diet restriction and forced sweating, and followed by a 5-h "loading" (food and drinks ad libitum). The net weight loss after GP and loading was 2.7 +/- 0.5%. Protein intakes (4-d food records) during GP and RP were 71 +/- 16 and RP 56 +/- 17 g.d-1, respectively. Carbohydrate intakes were 239 +/- 56 (GP) and 182 +/- 55 g.d-1 (RP). During GP and RP, mean thiamin, magnesium, and zinc intakes were at or below the respective recommendation. Thiamin, riboflavin, potassium, iron, and zinc status, assessed from blood chemistry, remained stable during both procedures. Changes in vitamin B6 indicator (E-ASTAC) and S-magnesium concentration were different (P < 0.01) between the procedures, suggesting negative trends during GP. Sprint (30-m run) and anaerobic (1-min Wingate test) performance was similar throughout the study. Following GP, vertical jump height with extra load increased by 6-8% (P < 0.01). Jumping results were not affected by RP. Hence, < or = 5% loss in body weight by either method did not impair experienced athletes' performance. |
| Databáze: | OpenAIRE |
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