Research has clearly shown that lacking sufficient calories, macro- and micro-nutrients may impair an athlete's training adaptations, while athletes who consume a balanced diet that meets energy needs can enhance physiological training adaptations. Maintaining an energy and nutrient deficient diet during training may lead to loss of muscle mass, strength, and bone mineral density, in addition to an increased susceptibility to illness and injuries, disturbances in immune, endocrine and reproductive function, and an increased prevalence of overreaching and/or overtraining. In children and adolescent athletes, an insufficient diet may additionally result in impaired physical growth. Incorporating good dietary practices as part of a training program is one way to help optimize training adaptations and prevent overtraining. Based on this, nutritional supplementation is an effective and safe approach for attaining the high nutritional requirements of adolescent athletes, to help them maintain healthy growth. Nutritional supplementation could also improve their body composition, sport performance and general health. The primary objective of the proposed study is to evaluate the effect of dietary supplement versus placebo on growth and physical activity performance in young athletes. A total of 50 young soccer players (25 in each group) will participate in this Double blind, randomized, placebo controlled study.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
50
Powder added to water,high protein and multi vitamins and minerals
Low caloric formula (Powder added to water), without added vitamins and minerals.
Schnider Children's Medical Center
Petah Tikva, Israel
Height SDS (standard deviation score)
Change in standard deviation score of participant's height between baseline and 4 months
Time frame: at 4 months
10m sprint score
Change in 10m sprint score between baseline and 4 months (test the speed and acceleration of the player)
Time frame: at 4 months
20m sprint score
Change in 20m sprint score between baseline and 4 months (test the speed and acceleration of the player)
Time frame: at 4 months
Countermovement Jump (CMJ) score
Change in Countermovement Jump (CMJ) score between baseline and 4 months (assess explosive strength of the lower extremity muscles)
Time frame: at 4 months
Agility test score
Change in Agility test score between baseline and 4 months(agility is the ability to change the direction of the body rapidly and is a result of a combination of strength, speed, balance and coordination)
Time frame: at 4 months
The Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) score
Change in the Yo-Yo IR1 score between baseline and 4 months (The Yo-Yo IR test measure the ability to recover from intense exercise)
Time frame: at 4 months
weight-SDS
Change in standard deviation score of subject's weight between baseline and 4 months
Time frame: at 4 months
BMI-SDS
Change in standard deviation score of subject's BMI between baseline and 4 months
Time frame: at 4 months
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