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Peptides and HIIT Training Synergy Timing: Protocol Comparison
This table compares three peptide timing strategies around HIIT training and their distinct physiological outcomes. 30–60 min pre-HIIT 100–200mcg ipamorelin or hexarelin subcutaneously Direct overlap. Exogenous Tmax occurs during endogenous GH surge 90–120 min
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- This table compares three peptide timing strategies around HIIT training and their distinct physiological outcomes.
- 30–60 min pre-HIIT
- 100–200mcg ipamorelin or hexarelin subcutaneously
- Direct overlap. Exogenous Tmax occurs during endogenous GH surge
- 90–120 minutes post-exercise
- 4–6 hours if insulin kept low
- Body recomposition, fat loss with muscle preservation
- Optimal synergy. This is the protocol that produces compounded GH peaks and extended lipolytic signaling
- Immediately post-HIIT
- 100–200mcg ipamorelin subcutaneously
- No overlap. Exogenous Tmax occurs 45–60 min after endogenous pulse has declined
- 60–90 minutes (isolated peptide effect only)
- 2–3 hours
- Recovery-focused protocols where glycogen replenishment is prioritized over fat oxidation
- Loses the synergistic amplification entirely. Functions as standalone peptide dosing, not a training multiplier
- CJC-1295 DAC (steady-state)
- 2mg CJC-1295 DAC weekly
- No discrete Tmax. Produces baseline GH elevation across 6–8 days
- Not applicable (steady elevation, no pulse)
- Continuous low-grade lipolysis
- Muscle preservation during caloric deficit, anti-aging protocols
- Does not interact with HIIT timing. Different mechanism entirely, suited for background anabolic support
- The 30–60 minute pre-HIIT window is the only timing strategy that synchronises exogenous peptide pharmacokinetics with exercise-induced endogenous GH release. Post-workout dosing eliminates temporal overlap, and DAC peptides don't produce the sharp Tmax required for convergence.