Walk into any fitness club this time of year and witness the phenomenon: What started on Jan. 1 as an unwavering commitment to get in shape has become a struggle to keep the momentum, if not an outright surrender. Gyms that were packed with people three weeks ago are starting to look deserted. For many people, fitness has lost ground to time and inertia.

Of course, a few display an exceptional level of perseverance. If you are a member of a gym, you likely know who they are; you notice โ€œthe new guy or girlโ€ and remark at the willpower. Despite the temptation to stay home, these individuals push themselves to keep going. That determination will help them reach their goal of better fitness, weight loss, and improved healthโ€”and may inspire the other people in the fitness club, too.