Here's a 5-minute workout that can replace high-intensity cardio:
1. Jumping jacks: 30 seconds
2. Squat jumps: 30 seconds
3. Mountain climbers: 30 seconds
4. Burpees: 30 seconds
5. Plank: 30 seconds
Repeat this circuit 2-3 times, taking short breaks in between, for a total of 5 minutes. These exercises are a combination of bodyweight exercises that work multiple muscle groups and get your heart rate up, providing a similar cardio benefit to high-intensity workouts.
It's important to always warm up before starting any workout, and to check with your doctor before making any changes to your exercise routine.