Proteine si o no?

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  • Eagle
    Bodyweb Member
    • Dec 2001
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    Proteine si o no?

    Ci sono (pochi) articoli che hanno evidenziato un reale vantaggio ipertrofico con aumenti di proteine/die. In particolare se assunte PRE + POST wo.

    Ci sono poi una serie di altri articoli che non hanno trovato NESSUN beneficio ad aumentare le proteine giornaliere, ne' per il parto post wo.

    Esempio ...

    J Sports Med Phys Fitness. 2002 Sep;42(3):340-7.Related Articles, Links

    Effects of high-calorie supplements on body composition and muscular strength following resistance training.

    Rozenek R, Ward P, Long S, Garhammer J.

    Department of Kinesiology and Physical Education, California State University Long Beach, Long Beach, California 90840, USA. rrozenek@csulb.edu

    BACKGROUND: Seventy-three healthy, male subjects randomly divided into 3 groups participated in a study to determine the effects of 2 high-calorie nutritional supplements on body composition, body segment circumferences, and muscular strength following a resistance-training (RT) program. METHODS: In addition to their normal diets group 1 (CHO/PRO; n=26) consumed a 8.4 Mj x day(-1) (2010 kcal) high calorie, high protein supplement containing 356 g carbohydrate and 106 g protein. Group 2 (CHO; n=25) consumed a carbohydrate supplement that was isocaloric with CHO/PRO. Group 3 (CTRL; n=22) received no supplement and served as a control. All subjects were placed on a 4-day x week(-1) RT program for 8 weeks. RESULTS: Dietary analysis revealed no significant differences in total energy consumption or nutrients at any time in the non-supplemented diets of the 3 groups. Significant (p= or <0.05) increases in body mass (BM) and fat-free mass (FFM) were observed in CHO/PRO and CHO compared to CTRL. Mean (+/- SD) increases in BM were 3.1+/-3.1 kg and 3.1+/-2.2 kg, respectively. Fat-free mass significantly (p= or <0.05) increased 2.9+/-3.4 kg in CHO/PRO and 3.4+/-2.5 kg in CHO. Muscular strength, as measured by a one-repetition maximum in the bench press, leg press, and lat-pull down increased significantly (p= or <0.05) in all groups. No significant differences in strength measures were observed among groups following training. CONCLUSIONS: Results indicate that high-calorie supplements are effective in increasing BM and FFM when combined with RT. However, once individual protein requirements are met, energy content of the diet has the largest effect on body composition.


    Esperienze?

    Opinioni (possibilmente supportate da situazioni reali)?

    Io, nel mio piccolo, devo dire che devo concordare con l'articolo, non ostante mi piacerebbe pensare che le cose siano diverse, piu' poetiche, piu' "alla ricerca della strategia magica che nessuno conosce" ...

    Eagle
    Io credo nelle persone, però non credo nella maggioranza delle persone. Mi sa che mi troverò sempre a mio agio e d'accordo con una minoranza.

    NEUROPROLOTERAPIA - la nuova cura per problemi articolari e muscolari. Mininvasiva ma soprattutto, che funziona!
    kluca64@yahoo.com
  • Eagle
    Bodyweb Member
    • Dec 2001
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    #2
    Altro esempio ... nessuna differenza dopo 10 settimane ... ok, forse dopo anni ci sarebbe stata una qualche differenza ... ma ha un senso tutto cio???

    Eagle

    J Am Coll Nutr. 2004 Aug;23(4):322-30.Related Articles, Links

    Effect of post-exercise supplement consumption on adaptations to resistance training.

    Rankin JW, Goldman LP, Puglisi MJ, Nickols-Richardson SM, Earthman CP, Gwazdauskas FC.

    Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg VA 24061-0430, USA. jrankin@vt.edu

    OBJECTIVE: Athletes are interested in nutritional manipulations that may enhance lean tissue gains stimulated by resistance training. Some research demonstrates that acute consumption of food containing protein causes superior muscle protein synthesis compared to isoenergetic foods without protein. This benefit has not been verified in longer-term training studies. We compared body composition and muscle function responses to resistance training in males who consumed a carbohydrate or a multi-macronutrient beverage following each training session. METHODS: Nineteen, untrained men (18-25 years) consumed either a milk (MILK) or a carbohydrate-electrolyte (CHO) drink immediately following each workout during a 10 week resistance training program. Muscle strength (1RM for seven exercises), body composition (DXA scan), fasted, resting concentrations of serum total and free testosterone, cortisol, IGF-1, and resting energy expenditure (REE) were measured prior to and at the end of training. RESULTS: Resistance training caused an increase (44 +/- 4%, p < 0.001) in muscular strength for all subjects. The training program reduced percent body fat (8%, p < 0.05, -0.9 +/- 0.5 kg) and increased fat-free soft tissue (FFST) mass (2%, 1.2 +/- 0.3 kg, p < 0.01). MILK tended to increase body weight and FFST mass (p = 0.10 and p = 0.13, respectively) compared to CHO. Resting total and free testosterone concentrations decreased from baseline values in all subjects (16.7%, 11%, respectively, p < 0.05). Significant changes in fasting IGF-1, cortisol, and REE across training were not observed for either group. CONCLUSION: Post-resistance exercise consumption of MILK and CHO caused similar adaptations to resistance training. It is possible that a more prolonged training with supplementation period would expand the trend for greater FFST gains in MILK.
    Io credo nelle persone, però non credo nella maggioranza delle persone. Mi sa che mi troverò sempre a mio agio e d'accordo con una minoranza.

    NEUROPROLOTERAPIA - la nuova cura per problemi articolari e muscolari. Mininvasiva ma soprattutto, che funziona!
    kluca64@yahoo.com

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    • max_power
      Low-Carb Moderator
      • Dec 2000
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      #3
      Interessanti gli articoli.

      max_power
      Max_power, The Sicilian Rock

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      • giulio87
        Bodyweb Advanced
        • Nov 2004
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        #4
        ho appena comprato 3 kili e mezzo di proteine in polvere.... non facciamo questi scherzi..

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        • bboy18
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          #5
          ok il postr wo, e aumentando l'intero introito quotidiano?

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