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Wątek: Dieta z umiarkowanym deficytem kalorycznym przynosi zdrowsze rezultaty

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    Dieta z umiarkowanym deficytem kalorycznym przynosi zdrowsze rezultaty

    Moderate energy restriction with high protein diet results in healthier outcome in women

    Antti A Mero email, Heikki Huovinen email, Olle Matintupa email, Juha J Hulmi email, Risto Puurtinen email, Hannele Hohtari email and Tuomo AM Karila email

    Journal of the International Society of Sports Nutrition 2010, 7:4doi:10.1186/1550-2783-7-4
    Published: 25 January 2010

    Abstrakt:BackgroundThe present study compares two different weight reduction regimens both with moderately high protein intake on body composition, serum hormone concentration and strength performance in non-competitive female athletes.

    Fifteen normal weighted women involved in recreational resistance training and aerobic training were recruited for the study (age 28.5 +/- 6.3 yr, height 167.0 +/- 7.0 cm, body mass 66.3 +/- 4.2 kg, body mass index 23.8 +/- 1.8, mean +/- SD). They were randomized into two groups. The group 1KG (n=8; energy deficit 1100 kcal/day) was supervised to reduce body weight with 1 kg per week and the group 0.5KG (n=7; energy deficit 550 kcal/day) with 0.5 kg per week, respectively. In both groups protein intake was kept at least 1.4 g/kg body weight/day and the weight reduction lasted four weeks. At the beginning of the study the energy need was calculated using food and training diaries. The same measurements were done before and after the 4-week weight reduction period including total body composition (DXA), serum hormone concentrations, jumping ability and strength measurements

    During the 4-week weight reduction period there were no changes in lean body mass and bone mass but total body mass, fat mass and fat percentage decreased significantly in both groups. The changes were greater in the 1KG group than in the 0.5KG group in total body mass (p<0.001), fat mass (p<0.001) and fat percentage (p<0.01). Serum testosterone concentration decreased significantly from 1.8 +/- 1.0 to 1.4 +/- 0.9 nmol/l (p<0.01) in 1KG and the change was greater in 1KG (30 %, p<0.001) than in 0.5KG (3 %). On the other hand, SHBG increased significantly in 1KG from 63.4 +/- 17.7 to 82.4 +/- 33.0 nmol/l (p<0.05) during the weight reducing regimen. After the 4-week period there were no changes in strength performance in 0.5KG group, but in 1KG maximal strength in bench press decreased (p<0.05) but endurance strength in squat and counter movement jump improved (p<0.05)

    It is concluded that a weight reduction with 0.5 kg per week with ~1.4 g protein/kg/day can be recommended to normal weighted and physically active women instead of larger (e.g. 1 kg per week) weight reduction because the latter may lead to a catabolic state. Vertical jumping performance is improved when fat mass and body weight decrease. Thus moderate weight reduction prior major event could be considered beneficial for normal built athletes in jumping events.

    Źródło: http://www.jissn.com/content/7/1/4
    Ostatnio edytowane przez Solv ; 27-01-10 o 13:03

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