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Posts from the ‘training, physical activity and health’ Category

(Català) TAPERING: GESTIÓ DE CÀRREGUES EN PERÍODES PRE-COMPETITIUS

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(Català) Prevenció d’edema ossi i fractura per estrès

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(Català) EL CONCEPTE D’AGILITAT EN L’ESPORT. COM L’HEM D’ENTRENAR?

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(Català) ANÀLISI DE LES ASIMETRIES: UN MÈTODE DE PREVENCIÓ DE LESIONS EN JUGADORS DE BÀSQUET.

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(Català) FACTORS CONDICIONANTS DEL RENDIMENT ESPORTIU. EL CAS DEL BÀSQUET. ELS TIRS LLIURES ES FALLEN A CAUSA DE LA FATIGA O L’ANXIETAT?

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(Català) LA IMPORTÀNCIA DE LA REALITZACIÓ I INTERPRETACIÓ D’UNA PROVA D’ESFORÇ

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The more protein, the better? Protein requirements and protein overload dangers

Rosana Cortés. Graduada en Genètica per la Universitat Autònoma de Barcelona i la Universitat de Cambridge | Estudiant del Màster en Entrenament Esportiu, Activitat Física i Salut a la FPCEE Blanquerna per la Universitat Ramon Llull.

Protein powder consumption has become a routine among both elite and amateur athletes, a trend further promoted by sport companies and mass media; including sports press. And, in fact, we still don’t know which effects such behaviour might pose to health in the long term.

Due to the inflicted damage to their muscles by extenuating training, professional athletes may require a higher nutritional intake than for most population. However, protein shakes may be unnecessary, or even dangerous, in the fitness world. On the amateur sport field, training is rarely quantitatively measured and real nutrient requirements (including protein, carbohydrates, fat and water) are unknown.

To clarify, proteins are (i) amino acid strings or clusters of such strings (ii) with a particular structure, (iii) what gives them functionality. They play a role in tissue turnover, immune reactions, enzymatic activity (enzymes are protein clusters), substance transport and energy production. Adults require no more than 0.8 to 0.9 g of protein per kilogram of body weight every day day to satisfy their protein needs. In fact, protein requirements follow a normal distribution, needing most of people just 0.66 g/kg·day1. Following EFSA (European Food Safety Authority) 2015 data, protein needs in European population are 0.83 g/kg·day for adults and healthy elderly2 (Figure 1).

 

f1egFigure 1. Formula for total protein requirement calculations based on body weight2.

To help you have an idea of real protein content in food, Table 1 shows the quantity of protein per 100 grams of different example foods, reported by the USDA (United States Department of Agriculture)3. Table 2 shows an example of an appropriate protein intake for a person of 75 kg, who needs 62.88 g of protein per day. Total caloric intake is not adjusted, as it will depend on energy demands and physical activity. The heavier a person is, the bigger their servings are, so protein content will increase proportionally. It is of highly importance to include a high-quality protein portion in main meals4 (Table 3).
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(Català) COMPARACIÓ DELS NIVELLS D’ACTIVACIÓ MUSCULAR entre FLEXIONS DE BRAÇOS EN EL TERRA VS EN SUSPENSIÓ

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(Català) ENTRENAMENT PROPIOCEPTIU A NEDADORS INFANTILS DE 8 A 12 ANYS

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(Català) ENTRENAMENT DEL CORE APLICAT AL JUDO

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