Stamina is a company that encourages endurance by creating fitness solutions for adults and most older children. For more than 20 years, their vast inventory consists of stationery bikes, elliptical machines, rowers, steppers, and treadmills. Stamina also carries AeroPilates, a great regimen for those seeking a low-impact workout. Children of all ages will love their line of trampolines, which encourages fitness.