2 years of 20-30 minutes, 5 times a week reverses 20 years of heart aging in 50 year olds.
Norwegian 4×4 = 4 minutes HIT then 3 minutes recovery for 4 times.
Tom's Blog on Life and Livingness
2 years of 20-30 minutes, 5 times a week reverses 20 years of heart aging in 50 year olds.
Norwegian 4×4 = 4 minutes HIT then 3 minutes recovery for 4 times.