One of the benefits of a circuit workout is that the mix of strength training and aerobic exercises offer an endless number of combinations. To emphasize the switch between each activity, this playlist alternates between pop songs around 130 BPM (for slower, strength-building exercises) and rock songs around 150 BPM (for faster, aerobic ones). By bouncing back and forth between artists like Jennifer Lopez and Kings of Leon, the tempo shifts will indicate when it's time to change exercises and the genre changes should keep you from getting bored.
Here's the full list:
Calvin Harris - Feel So Close (Benny Benassi Remix) - 131 BPM
Kings of Leon - Sex on Fire - 150 BPM
David Guetta, Ne-Yo & Akon - Play Hard - 130 BPM
Boys Like Girls - Love Drunk - 150 BPM
Kelly Rowland & Lil Wayne - Motivation (Rebel Rock Remix) - 130 BPM
Ash - Arcadia - 151 BPM
Jennifer Lopez & Pitbull - On the Floor - 130 BPM
Pearl Jam - The Fixer - 152 BPM
Dragonette - Let It Go - 131 BPM
Neon Trees - Everybody Talks - 155 BPM
To find more workout songs, check out the free database at Run Hundred. You can browse by genre, tempo, and era to find the best songs to rock your workout.