12-minute challenge: Try this workout that's short, intense, and totally worth it

Helen Mirren reveals the 12-minute military workout she's relied on to keep fit for 60 years

Here's a workout you can do in your backyard, gym, or wherever you have just a little bit of space. All you need is a medicine ball and motivation to work hard. This workout is brought to you in partnership with @OfficialMETRx! 💪 Here's what you're going to do: Set an interval timer to 18 rounds of :10 and :30 second intervals, rest on the :10 ones and work SUPER hard on the :30 ones. Go through these exercises: 1. Squat thrusts 2. Boxer push ups 3. Medicine ball slams 4. Jump lunges 5. Mountai