New to challenges or on Day 0 to get back in shape? Try this super short full body challenge without equipment to warn your body of imminent workout days ahead.

If some exercises are too difficult from the get go, focus on getting your form correct rather than the full rep count and repeat this challenge after resting up for a couple of days.

Have an outdoor exercise station or jungle gym nearby? Try this circuit to sweat it out and challenge every part of your body.

With such an intense set of exercises, remember to warm-up sufficiently before breaking into your first set!

Don't like your downstairs neighbour or just need some knee pumping action to get your core and legs moving? Try this with varying levels of speed to adjust the difficulty.

Be kind to your neighbours and do this outdoors or with a thick mat at least!

Don't have much time but still want to fit in something to get yourself moving? The only thing you need is a set of light - medium dumbbells to start sweating it out!

Adjust the amount of rest time between each set in order to keep the intensity up but don't rush these dynamic exercises in order to get the most of the burn.

A small set of core exercises with low repetitions to get going but with a surprise at the end!

The first 2 days might go well but you'll really start to feel your muscle endurance tested as you finish off the last few days of the challenge, come back for more...

Not sure if HIIT is your thing? Try completing this basic but full body explosive challenge for yourself!

Keep up a steady pace for exercises without stopping but take a 1 - 2 minute break between sets.

A challenge that is sure to give you a balanced workout by recruiting muscles for push on one day and pull on the other.

Push and pull workouts are fantastic for ensuring you're not focusing too much on a single area resulting in a lag of supporting muscle groups nearby. It also allows you keep exercising for more days in a row by rotating the different groups of muscles you use!

Don't fancy moving around too much or just can't because of weather / space constraints? Try this set of static holds that will leave your muscles on fire and build endurance over time.

Keep your core tight and control your breathing as you work on your holds. For a more comfy session roll out a yoga mat for ground based exercises and your back will thank you later on.

There's something about a good set of push-ups that really makes you feel like you're going to be buff like Captain America so why not keep at it?

For more advanced users try out different variations e.g. diamond, decline to match your skill level for these 432 push-ups.

Leg day need not be all about heavy weights, here is a plan that will build strong legs through body weight movements!

Work your way steadily up till the last two days where an extra exercise is introduced for increased difficulty.

Want to fill in your shirts with a bit more mass on your chest? Try this pec focused routine with your desired weights and build them up over time.

Getting your form right in the beginning is the key but try adding a small weight increase for the same exercise the next day, ensuring you're not lifting too heavy at any given time.

A simple challenge to build those core muscles that will stabilise you in all other exercises.

Instead of variety this challenge focuses on repetition on 4 exercises - crunches, front planks, side planks and leg raises with tiny increases over 4 weeks in order to steadily increase abdominal muscle endurance.

Looking for leg days? How about a leg month? Rotate between static and cardio routines to strengthen fast and slow twitch muscles.

This challenge builds up slowly to ensure you have enough time to condition yourself for the end but don't underestimate the burn!