"Coffee could deliver more of a jolt than you'd expect. Swiss scientists recently determined that caffeine decreases bloodflow to the heart during exercise by as much as 39 percent. Normally, as a person's activity level increases, coronary arteries expand to let in more oxygen-carrying blood.
But that process was inhibited when study participants consumed 200 milligrams of caffeine -- the amount in 2 cups of coffee -- about an hour before working out. Although the caffeine didn't harm the healthy study participants, lead researcher Philipp Kaufmann, M.D., suggests avoiding it for 4 to 5 hours before exercise if you have a family history of heart disease."
-Men's Health
This is kind of disappointing because my grandfather died of a stroke and my dad has had a heart attack. There are so many awesome preworkout products like RPM and JP8 out there. Any thoughts on this?
But that process was inhibited when study participants consumed 200 milligrams of caffeine -- the amount in 2 cups of coffee -- about an hour before working out. Although the caffeine didn't harm the healthy study participants, lead researcher Philipp Kaufmann, M.D., suggests avoiding it for 4 to 5 hours before exercise if you have a family history of heart disease."
-Men's Health
This is kind of disappointing because my grandfather died of a stroke and my dad has had a heart attack. There are so many awesome preworkout products like RPM and JP8 out there. Any thoughts on this?