Try a high-intensity interval training (HIIT) workout.

“Now, my friend took me to a HIIT class for the first time yesterday, and I thought I could handle it due to being quite active but boy how mistaken was I! I absolutely hated it, it felt horrible and kept feeling this way for the whole day afterwards. Almost passed out. Teacher had us do 45x15, 3 times over a circuit of 8 exercises including burpees, bench squats, mountain jacks etc. I knew most of the exercises already but had never performed them at such a pace or for this long.”

“Today I thought I would switch things up and try High Intensity Interval Training. My structure was simple: 1. I would sprint for one minute 2. Walk for thirty seconds. The first two or three rounds of High Intensity Interval Training felt manageable. After that High Intensity Interval Training got really tough really fast. By round five of High Intensity Interval Training I was completely exhausted. I was breathing heavily my legs were giving up I could not even think straight. For a moment it genuinely felt like I had pushed High Intensity Interval Training far. I had to stop High Intensity Interval Training. It took me a while to recover from High Intensity Interval Training. I could not walk properly for a bit I also had no appetite.”

“Yesterday I decided to do a HIIT workout with her and oh my god. I was about to pass out. I couldn’t do the strength part where she added man makers. I do them regularly at my crossfit workouts but I COULDN’T DO HERS because she left me with no air to breathe.”