If you believe you have the fitness levels of a god and only currently do two forms of exercise of either weight lifting or cardio; then its time to be introduced to the more general all round HIIT training routines out there namely Crossfit and Calithenics which will truly test your fitness levels.
CrossFit is a strength and conditioning program designed to help people gain a broad and general fitness.
So CrossFit was developed by Greg Glassman in 2000, and has taken the world by storm. It incorporates a mixture of olympic weight lifting, aerobic and gymnastics exercises. What this entails is a very broad based fitness regime that works all muscle groups in the body giving a total body workout. CrossFit is done at high intensity and tests your speed, strength and endurance all of which is timed and by the end of the session you should be on the floor panting for breath in a pool of sweat.
Think you are up to the challenge?
Well, here is link to a beginners work out routine: 16-Days of Beginner CrossFit Workouts You Can Do From Home
OR if you believe you are a fitness god, good luck trying these brutal crossfit routines: The 6 most brutal crossfit wods
Calisthenics are a form of exercise consisting of a variety of exercises, often rhythmical, movements, generally without using equipment or apparatus.
Calisthenics is a more extreme form of exercise mainly using bodyweight as the source of resistance. In its more brutal form of Extreme Calisthenics as seen above, takes years of training and dedication; but probably gives you the ultimate party tricks that can be used anywhere.
The fundamental exercises that Calisthenics is based around are: