Joined: Feb 2013
Posts: 1,472
Likes: 11
From: Near St. Louis, Missouri
Bikes: Giant Defy Advanced, Breezer Doppler Team, Schwinn Twinn Tandem, Windsor Tourist, 1954 JC Higgens
Anything above 0 is good. I had my little heart attack in the upper 170s at 46 YO. I urge caution when doing an unsupervised cardiac stress test in the middle of nowhere.