The kettlebell is an effective, bell-shaped piece of equipment that will help you build some major muscles. This equipment is your ticket to faster fitness, even for beginners. Well-suited to the heart rate-spiking benefits of HIIT, these weights develop power, endurance, muscle and strength simultaneously for heavyweight results. And since they're compact, adaptable and versatile, the kettlebell is an ideal bit of kit for the home workout warrior.

The growing popularity of sports such as CrossFit have helped drive kettlebell training and workouts into the mainstream, but the idea is nothing new. You don't need anything more than this in combination with your bodyweight to effectively train for strength, build muscle and conditioning. Usually, these workouts feature a high-rep range, meaning that multiple muscles (full-body) are worked at once. If kept at a consistent pace, they can offer similar aerobic benefits to tabata HIIT training.