Three Minutes of Sprinting May Outmatch 90 Minutes of Cardio, New Study Finds
A sprint-interval workout totaling three minutes (six rounds of 30 seconds all-out with four minutes recovery) produced widespread immediate changes in blood proteins linked to heart health, vascular growth, tissue remodeling, and hormonal signaling—altering 32 of 33 proteins associated with lower metabolic-disease risk. By contrast, moderate cardio caused minimal immediate protein changes. The findings suggest short, high‑intensity bursts may offer powerful protective effects and that one high‑intensity session per week might help reduce disease risk.