HGH secretagogues will only give you better sleep at most...something that you can use meletonin for....but don't compare them to peptides.
As far as they are good for athletes and bodybuilders is not relevant. The training for a sprint athlete other than running is plenty of time hitting the weights. The body is not going to know the difference between a person training for bodybuilding and one training for spinting. Its still going to be breaking down muscle to which a shot of GHRP will expedite your recovery time and rebuild that muscle which is the purpose of that particular peptide. You have to use a supplement at the time it needs to be used. Its like taking aspirin when you don't even have a headache.
Do the research and purchase what you need based on your goals whether its off-season, contest, bulking up, maintaining, etc
Dude, GHRP IS a secretagogue. By definition a secretagogue is a substance that makes your gland secrete an hormone... So it is fair to compare them to peptides because most of the peptides you mention are also... secretagogue!!! CJC is also called GHRH 1-29 or GHRF (growth hormone releasing hormone or factor) and GHRP-2 or 6 (growth hormone release peptide). They are in fact both secretagogue...
http://www.merriam-webster.com/dictionary/secretagogueAs for bodybuilding versus athletes training, your arguments are invalid. There is a saturation dose when using GHRP or CJC. That limits the number of uses in a given day AND, since bodybuilders need really high amount of GH to produce muscles (I've heard of 4 to 8 ius a day but it is mainly bro science), peptides won't work for that purpose besides maybe recomping. But for an athlete that might use help in recovering his muscle but, most importantly, his connective tissues (tendons, joints etc...), peptides even with their limitations of saturation doses are a great help. Bodybuilders have very different needs with their connective tissues so a small GH pulse might not be all that helpful to them.... Read Victor Conte protocol for sprinter and you will see that anabolics play only a small role for them whereas a bodybuilder has very different needs and uses anabolic as a staple in his "stack".... You will also see that the amount of HGH used for athletes is relatively small (4,5 iu 3 times a week, not daily) which is about what peptides can give you....following a good protocol.
http://news.bbc.co.uk/sport2/hi/olympics/athletics/7403158.stmThe training protocol of sprinter (and most athletes) has heavy weight training only in the offseason. Pre-season, most switch to ballistics, plyos, explosive movements, intervals, and you know sprinting and such. The "muscle tears" from that type of training is heaps and bounds different from the muscle tear while weight training for hypertrophy. If anything the Central Nervous System is taxed way more than the muscle. Even tendons responsible for the stretch reflex are more taxed by that type of training. Guess what? Anabolics are next to useless for tendons (ever heard of a winstrol injury..?). HGH really helps for connective tissues.
Your last phrase is also invalid: the half life of all peptides is ridicululously short (except for CJC with DAC) and your GH pulse will only last 3 hours at best. But you won't recover fully from your workout in that period. You recover in between workouts. So using peptides only on training days is far from optimal.
Here are some scientific articles to help you out a bit:
http://www.sciencedirect.com/science/article/pii/S0196978197000168http://www.sciencedirect.com/science/article/pii/S1043276098001167http://www.sciencedirect.com/science/article/pii/S0026049597901748http://press.endocrine.org/doi/abs/10.1210/jcem.75.2.1379256So yeah, I did my research, in fact this is what I'm paid to do :-)