Sprint Interval Training (SIT)
Use dumbbells to turn up the intensity using a 1:4 interval structure. This means you'll rest for 4 minutes after every working interval so you can truly deliver a max-effort output.
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Use dumbbells to turn up the intensity using a 1:4 interval structure. This means you'll rest for 4 minutes after every working interval so you can truly deliver a max-effort output.