Men's Health; Jason Speakman/MH Illustration

SOMETIMES, THE MOST challenging part of working out is knowing what to do.

You might not have a definite goal in mind other than that you want to get moving, or that you want to look different by the time the summer season rolls around. That's okay. Not everyone is wired to constantly aspire to build muscle or run fast, following a detailed program designed to elicit peak performance and radical transformation. Just wanting to get active to live a healthier life is a worthy goal, especially if you're taking your first steps to make fitness part of your daily routine or recommitting to exercise after a break. But you have to be ready to commit to your new routine for it to be effective.

That's what the Men's Health 30-Day Workout Challenge is all about: doing something every day.…