With all these interval workouts available, the question is: Is there one best interval workout out there? One group of researchers think it's the 10-20-30 training concept.
| The 10-20-30 Workout | With all these interval workouts available, the question is: Is there one best interval workout out there? One group of researchers think it's the 10-20-30 training concept. | | READ NOW | | | | | | | You are receiving this newsletter because you subscribed to the Fit Life newsletter. If you wish to unsubscribe, please click here. | | 1500 Broadway, 6th Floor, New York, NY, 10036 | | | | | | | | |
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