well as the efficiency of the O2 consumption and the lactic threshold ), other factors are also themselves as determinants in the athlete ’ s sporting success , notably complexes factors of a motivational and sociological nature . 7 The study design used in this work also seems to have little transfer for elite athletes , as it implied total interruption of training for two days . In relation to the stress fractures , it should also be stressed out that the these only represent up to 20 % of the injuries sustained in the sports , and even in some sports it may represent only 0.7 %. 8 In women , other factors such as amenorrhea also seem related to their occurrence 9 , so these results should not be extrapolated to the female gender , due to the physiological and hormonal complexity involved .
This overvaluation of short-term results recalls the excessive importance that has already been given to the immediate replacement of carbohydrates after the exercise , which is only justified when the interval between workouts is less than 8 hours and loses relevance when it is superior . 10 In the same line of reasoning , it seems a risky step to translate effects into intermediate markers for an outcome more final , such as bone density or risk of fractures . It is therefore urgent to carry out studies that can measure directly the bone mineral density in response to these intermediate markers , such as the radiological Dual Energy Densitometry ( DED ). This work , again recalls the enormous importance given to the impact of protein intake on the short-term muscular protein synthesis assuming that it would inevitably translate into muscular hypertrophy , which is not so linear . 11 Last , and not least , it is a frank limitation of this study not to have corrected the values of the markers for the hemoconcentration , as well as not to have presented data of the intake of other important nutrients for bone health , other than calcium , like magnesium and vitamins A and D . In future studies , it would also be interesting to evaluate the effect of exercise intake on days of multiple training sessions , particularly at night , since there is a zenith at this time of day in the biochemicals markers of bone turnover . 8
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Revista de Medicina Desportiva informa march 2018 · 5