[Kernkraft]

Very interesting read:

Physical effects of short-term recombinant human growth hormone administration in abstinent steroid dependency.

Graham MR, Baker JS, Evans P, Kicman A, Cowan D, Hullin D, Thomas N, Davies B.

Health and Exercise Science Research Unit, Faculty of Health Sport and Science, University of Glamorgan, Pontypridd, UK. drgraham@glam.ac.uk

BACKGROUND/AIMS: Recombinant human growth hormone (rhGH) as opposed to cadaver pituitary GH is misused for physical improvement. Six days' rhGH administration, in abstinent anabolic-androgenic steroid dependents, was compared with controls. METHOD: Male subjects (n = 48) were randomly divided into two groups: (1): control group (C), n = 24, mean +/- SD, age 32 +/- 11 years, height 1.8 +/- 0.06 m; (2): rhGH-using group (0.058 IU.kg(-1).day(-1)) (GH), n = 24, mean +/- SD, age 32 +/- 9 years, height 1.8 +/- 0.07 m. Physiological measurements included anthropometry, strength, power and peak oxygen uptake (VO(2) peak). Biochemical measurements included haemoglobin, packed cell volume, glucose, sodium, potassium, urea, creatinine, total protein, albumin, thyroid function, testosterone, prolactin, cortisol, GH and insulin-like growth factor-I (IGF-I). RESULTS: Strength, peak power output and IGF-I significantly increased and total protein, albumin and free tetra-iodothyronine significantly decreased compared to controls (p < 0.05) and within the GH group (p < 0.017). Fat-free mass index and VO(2) peak significantly increased, while body fat and thyroid-stimulating hormone significantly decreased within the GH group (p < 0.017). CONCLUSIONS: Short-term rhGH increased strength and power. Of therapeutic value is the possibility that muscle bulk and strength could be increased in patients with muscle-wasting conditions. (c) 2008 S. Karger AG, Basel

Short-term recombinant human growth hormone administration improves respiratory function in abstinent anabolic-androgenic steroid users.

Graham MR, Baker JS, Evans P, Kicman A, Cowan D, Hullin D, Davies B.

Health and Exercise Science Research Unit, Faculty of Health Sport and Science, University of Glamorgan, Pontypridd, Wales, United Kingdom. drgraham@glam.ac.uk

OBJECTIVES: To determine whether 6 days recombinant human growth hormone (rhGH) administration, in an abstinent anabolic-androgenic steroid (AAS) using group had any respiratory, endurance exercise and biochemical effects compared with an abstinent AAS control group. METHODS: Male subjects (n=48) were randomly divided, using a single blind procedure into two groups: (1) control group (C) n=24, means+/-SD, age 32+/-11 years; height 1.8+/-0.06 m; (2) rhGH using group (0.019 mg kg(-1) day(-1)) (GH) n=24, means+/-SD, age 32+/-9 years; height 1.8+/-0.07 m. Anthropometry, respiratory muscle function and endurance exercise were investigated. Respiratory measurements examined, were forced expiratory volume in one second, forced vital capacity, maximum inspiratory pressure and maximum expiratory pressure. Endurance exercise was assessed by measuring peak oxygen uptake (VO(2)peak). Biochemical analysis included; haemoglobin, packed cell volume, glucose, sodium, urea, creatinine, total protein, albumin, testosterone and insulin like growth factor-I (IGF-I). RESULTS: Forced expiratory volume in one second/forced vital capacity, maximum inspiratory pressure, maximum expiratory pressure, and IGF-I significantly increased compared with the control group (all P<0.05). Body mass index, fat free mass index, peak oxygen uptake, maximum inspiratory pressure, maximum expiratory pressure, IGF-I and serum sodium significantly increased, whilst body fat, total protein and albumin, significantly decreased within the GH group (all P<0.017). CONCLUSION: The findings of this study indicated that short-term high dose rhGH increased aerobic performance and respiratory muscle strength in former AAS users.