A boot-camp class that combines upper- and lower-body moves - like walking lunges and push-ups - gets the heart rate up quickly, burning fat and calories and toning muscles in a time-efficient way.

I see more people taking charge of their well-being through the use of data and digital sensors, wearable health bands, and smartphone apps that can track and quantify everything from their heart rate, blood pressure, and sleep quality to steps walked and calories consumed.

I hate the treadmill. I hate it. You really don't have to be on it that long, something like 20 or 30 minutes. It's all about getting your heart rate up.

I exercise in the gym about three times a week. I vary the workout every time, but I'll always do some type of circuit work with weights. It gets my heart rate up without putting too much stress on my knees, which for some reason seem to be older than the rest of my body.

Anything that's slightly dangerous and gets the heart rate going is my kind of workout.

I like to get the body temperature up, the heart rate up. I'll do anywhere from 10 to 25 minutes either on a bike, a rower, a StairMaster, or a combination of the three of those. And then I'll normally run through a 20- to 30-minute session either on the Pilates reformer, the Cadillac, or the Pilates chair.

Myocardial oxygen consumption is determined by the work of the heart and is a function of arterial blood pressure and heart rate.

The hardest part was four days after the surgery - my heart rate was very high, I was choking, I couldn't cough, and I started crying. And it was seeing the way my chest looked, definitely deformed. I'm a fit guy, I'm a skinny guy, but to look in the mirror I was bloated with all of the meds.

If I eat something a little crazy or if I feel sluggish, I know I have to eat better the next day and work out. I work out, I do circuit training so I try to keep my heart rate up whether I'm doing cardio, lifting weights or jumping rope. I like to mix it up. I also take Zumba classes - I love those, those are a blast.