Heat Shock Proteins (HSPs) are a family of proteins produced by cells in response to thermal stress. Despite the name, they're activated by both heat exposure (sauna) and cold (ice bath) — any significant temperature shift triggers their release.
Function
HSPs act as molecular chaperones: they repair misfolded proteins, prevent aggregation of damaged cellular components, and support protein homeostasis under stress. They're a core part of the cellular repair system.
Key Types
- •HSP70 — primary stress response protein; activated by heat, cold, and oxidative stress
- •HSP90 — regulates hormone receptors and signaling proteins
- •HSP27 — protects against apoptosis; enhances cytoskeletal stability
Activation Protocol
| Stimulus | Mechanism | Threshold | |----------|-----------|-----------| | Sauna (80–100°C) | Direct thermal stress | 15–20 min | | Ice bath (4–15°C) | Cold shock response | 3–5 min | | Intense exercise | Metabolic heat + mechanical stress | High-intensity bouts |
In ONDA Life
Heat Shock Proteins are a key outcome of the Thermal Range Fractionation protocol — hitting both temperature extremes in sequence maximizes HSP activation and trains the full vascular range simultaneously.
Practical Signal
Post-sauna or post-cold session: reduced muscle soreness, faster recovery, and improved training adaptation are downstream markers of HSP activity.