Effect of hydration on exercise-induced growth hormone response

**3XL** · 1 April 2007, 18:56

Nog steeds mensen die niets drinken tijdens de training?

Effect of hydration on exercise-induced growth hormone response.
Peyreigne C, Bouix D, Fedou C, Mercier J.
Departement de Physiologie, Laboratoire de Physiologie des Interactions, UPRES EA 701, Institut de Biologie, Faculte de Medecine, Boulevard Henri IV 34060 Montpellier, France. secphysio@medecine.univ-montp1.fr

DESIGN: Growth hormone (GH) has demonstrated water-retaining effects in subjects at rest, whereas other research has indicated that GH may stimulate sweating. Thus, the aim of this study was to investigate the effect of fluid intake on the exercise-induced GH response. METHODS: Seven healthy male volunteers (age: 27.4+/-1.3 years, weight: 74.5+/-1.1 kg, height: 179.3+/-2.3 cm) performed a 40-min submaximal rectangular cycling exercise in two different sessions. The first session (Session 1) was performed without water intake, and the second (Session 2) involved the ingestion of spring water (four intakes) corresponding to the volume of water lost during the first session. RESULTS: In session 1, the water loss was 568+/-32 ml. In Session 2, the volume of water loss was not significantly different from the volume of fluid intake (524+/-16 versus 568+/-32 ml respectively). The decrease in plasma volume was significantly reduced in Session 2 (-6.69+/-1.59% versus -11.3+/-1.89%; P<0.05). In Session 1, the GH concentration was significantly lower than that during Session 2 after 25 min (3.04+/-1.05 versus 5.26+/-1.81; P<0.05) and after 40 min (13.7+/-3.55 versus 17.60+/-4.14 ng/ml; P<0.05) of exercise. The total GH response was significantly lower in Session 1 than in Session 2 (136.6+/-39.2 versus 202.4+/-58.9 ng/ml x min; P<0.05).

CONCLUSIONS: We conclude that the exercise-induced GH response decreases when exercise is performed without fluid intake.

**HITMAN** · 1 April 2007, 20:12

Interessant. Drink zelf graag voor tijdens en na mijn training. Zit gauw aan 1½ liter water.

philosopher · 2 April 2007, 10:49

Had laatst nog iemand die vertelde mij dat drinken niet goed was en zeker geen kraanwater vanwege het hoge kalk gehalte. Heb hem geprobeert te overtuigen dat hij klink klare onzin vertelde en dat Tilburgs water het schooknste water van nederland is. Maar het drong helaas niet tot hem door. Drink zelf minimaal 0.5- 1 liter per workout

1 April 2007, 18:56	#1
3XL Super Moderator Geregistreerd: Apr 2002 Locatie: افغانستان Geslacht: V Posts: 11.098 Casino cash: €18850 Karma Power: 29	Effect of hydration on exercise-induced growth hormone response Nog steeds mensen die niets drinken tijdens de training? Effect of hydration on exercise-induced growth hormone response. Peyreigne C, Bouix D, Fedou C, Mercier J. Departement de Physiologie, Laboratoire de Physiologie des Interactions, UPRES EA 701, Institut de Biologie, Faculte de Medecine, Boulevard Henri IV 34060 Montpellier, France. secphysio@medecine.univ-montp1.fr DESIGN: Growth hormone (GH) has demonstrated water-retaining effects in subjects at rest, whereas other research has indicated that GH may stimulate sweating. Thus, the aim of this study was to investigate the effect of fluid intake on the exercise-induced GH response. METHODS: Seven healthy male volunteers (age: 27.4+/-1.3 years, weight: 74.5+/-1.1 kg, height: 179.3+/-2.3 cm) performed a 40-min submaximal rectangular cycling exercise in two different sessions. The first session (Session 1) was performed without water intake, and the second (Session 2) involved the ingestion of spring water (four intakes) corresponding to the volume of water lost during the first session. RESULTS: In session 1, the water loss was 568+/-32 ml. In Session 2, the volume of water loss was not significantly different from the volume of fluid intake (524+/-16 versus 568+/-32 ml respectively). The decrease in plasma volume was significantly reduced in Session 2 (-6.69+/-1.59% versus -11.3+/-1.89%; P<0.05). In Session 1, the GH concentration was significantly lower than that during Session 2 after 25 min (3.04+/-1.05 versus 5.26+/-1.81; P<0.05) and after 40 min (13.7+/-3.55 versus 17.60+/-4.14 ng/ml; P<0.05) of exercise. The total GH response was significantly lower in Session 1 than in Session 2 (136.6+/-39.2 versus 202.4+/-58.9 ng/ml x min; P<0.05). CONCLUSIONS: We conclude that the exercise-induced GH response decreases when exercise is performed without fluid intake. __________________ As you are now, I once was. As I am now, you'll never be ©3XL ®2000 The only easy day was yesterday...............Life is hard, so am I Geloof niets, probeer alles

1 April 2007, 20:12	#2
HITMAN bodybuilding coach Geregistreerd: Oct 2004 Locatie: Nederland Geslacht: M Posts: 2.208 Casino cash: €22050 Karma Power: 17	Re: Effect of hydration on exercise-induced growth hormone response Interessant. Drink zelf graag voor tijdens en na mijn training. Zit gauw aan 1½ liter water. __________________ Hij is meedogeloos, hij heeft dodelijke precisie, hij heeft geen naam, maar een nummer... hij is Hitman derin004@hotmail.com Voorzitter AAA elite club

2 April 2007, 10:49	#3
philosopher Competitive Bodybuilder Geregistreerd: Mar 2005 Locatie: Nederland Leeftijd: 23 Geslacht: M Posts: 2.290 Casino cash: €6000 Karma Power: 13	Re: Effect of hydration on exercise-induced growth hormone response Had laatst nog iemand die vertelde mij dat drinken niet goed was en zeker geen kraanwater vanwege het hoge kalk gehalte. Heb hem geprobeert te overtuigen dat hij klink klare onzin vertelde en dat Tilburgs water het schooknste water van nederland is. Maar het drong helaas niet tot hem door. Drink zelf minimaal 0.5- 1 liter per workout

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