There are numerous exercises available and easily accessible but the challenging thing to most people is choosing the one which suits them. Just having to walk by treadmills, stationary bikes, and weight machines can be enough to make you head straight back home to the couch. The best exercise should be easy to execute and target multiple muscles that will help you attain your fitness goal. 

Though old-school, push-ups is one of the best exercises to keep your body in shape. Although the primary target of the push-ups is the triceps, core, and the chest, it involves a wide range of the body muscles in the exercise. When a person completes a push-up, they lift almost 60% of their body mass which make it one of the best exercises to keep your body fit.

Another classic exercise to keep your body shape is the squat. This type of exercise is most beneficial to the lower part of the body. The primary targets of the squat are the glutes, hamstrings, and hips but it also benefits your upper body and even the core indirectly. Some people may focus on exercises which work on their upper body while neglecting their lower body. This is not effective especially when you want to attain a fit for your body.

This exercise performs the triple duty by working the hamstrings, the glutes, and the quadriceps extensively. There are various ways through which the lunges can be executed. For instance, the traditional way is executed by working one leg at a time.

This exercise is performed by putting your fit on top of a stability ball while in a push-position. You lift your butt into the air using your core muscles and then lowering your body back down allowing it to move along the ball. This exercise engages all muscles in your body.

Cycling is one of the most basic ways to get your body to shape. It involves the leg muscles and hence strengthening your lower body. If you enjoy cycling either indoors or outside, some of the best spin bikes according to the Fitness Equipment Reviews best spin bikes in 2018 include Pelaton, ProGear 100S Exercise Bike, and the Keiser M3i Indoor Cycle.

This exercise may look silly and complicated but is one of the exercises to get your body in shape. Burpees combine to exercises in one (Squats and push-ups) and hence involving both the upper and lower body in the exercise.

This exercise may seem basic to many people but it helps to build total body strength. The effective exercise of the deadlift strengthens your glutes, forearms, squats, hamstrings, core, calves as well as your back. The lift is risky but simple and with the effective attention and focus it can be completed without any injuries.

Walking

This exercise might look basic but none of the other exercises beats walking mainly because it is functional, accessible, and effective to all abilities and ages. Walking has some health benefits which include reducing the risk of diseases like hypertension, depression, and minimizes the risks of a premature death.

In conclusion, the best exercise is one which is easily accessible and involves most of the body muscles. It is crucial to note that it's better to do just a few reps of each movement perfectly, rather than doing many reps of the movements wrong. It is also advisable to choose an exercise that involves both the lower and upper body in order to attain the desired fitness.