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Jennifer Renfroe

Jennifer Renfroe is the regional director of group fitness for Crunch Fitness┬« in Atlanta. She is also a master trainer for the Nautilus InstituteÔäó/Schwinn Cycling┬«. Certifications: ACE, AFAA


Article Archive

Partner Workout: Cardio & Plyo

September 22, 2016

If you’re looking for a new way to add interest to your cardio classes, double the fun with partner drills. In this intense interval workout, drills consist of a 1-minute work effort, a 30-second recovery, and then a second 1-minute work effort. However, there’s a twist: The recovery isn’t a true recovery. Instead, you use the 30 seconds to do a quick series of “sculpting” moves designed to bring down the intensity while strengthening the body.

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Sample Class: It Takes Two

August 24, 2016

Sample Class: It Takes Two
Pair up participants for a great cardio workout.
By Jennifer Renfroe

If you’re looking for a new way to add interest to your cardio classes, double the fun with partner drills. In this intense interval workout, drills consist of a 1-minute work effort, a 30-second recovery, and then a second 1-minute work effort. However, there’s a twist: The recovery isn’t a true recovery. Instead, you use the 30 seconds to do a quick series of “sculpting” moves designed to bring down the intensity while strengthening the body.

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Get Intense: HIIT the Highway!

July 21, 2016

High-intensity interval training is still enjoying a wave of popularity, thanks to its ability to stimulate results in less time than other formats. Help attendees stay focused, engaged, and motivated to meet their fitness goals as you mix it up a little with HIIT the Highway. This class features dedicated 40-second work efforts followed by 20-second recoveries. One unique aspect of HIIT the Highway is that it uses athletic drills that relate to running and power, for a nice combination that truly exhausts energy reserves.

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Sample Class: HIIT The Highway

March 21, 2016

High-intensity interval training is still enjoying a wave of popularity,
thanks to its ability to stimulate results in less time than other
formats. Help attendees stay focused, engaged, and motivated to meet their
fitness goals as you mix it up with HIIT the Highway. This class features
dedicated 40-second work efforts followed by 20-second recoveries. One
unique aspect of HIIT the Highway is that it uses athletic drills that
relate to running and power, for a nice combination that truly

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Sample Class: Outdoor Conditioning Drills

October 25, 2012

If you want to offer a class that helps participants break out of a rut, leave the group fitness studio behind and head outside to a playing field. Scout out a local football, baseball or soccer field and transform it into a training ground. Use the existing field design and the premarked lines (hash marks, yard line markers and goal lines) to create an exciting and dynamic class. Combine speed, agility, power and body-weight strength drills to tap into the inner athlete in everyone.

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Sample Class: Playing the Field

September 27, 2012

If you want to offer a class that helps participants break out of a rut, leave the group fitness studio behind and head outside to a playing field. Scout out a local football, baseball or soccer field and transform it into a training ground. Use the existing field design and the premarked lines (hash marks, yard line markers and goal lines) to create an exciting and dynamic class. Combine speed, agility, power and body weight strength drills to tap into the inner athlete in everyone.

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Your Career: Rediscover, Redirect and Refocus

May 1, 2012

A group fitness instructor’s career path often has many sharp turns and curves. New trends, club openings and closings, fluctuating job opportunities and shifts in teaching interest are just a few of the changes you might face. Learning how to deal successfully with these turns and curves can be challenging. Whether planned or unexpected, good or bad, change can cause even the most seasoned instructor to re-evaluate her desire to teach.

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BOSU® Balance Trainer Warm-Ups

February 19, 2009

By adding a new piece of equipment like the BOSU Balance Trainer to your warm-up, you can turn an old warm-up into a fresh challenge for participants. You also expose students to equipment they might not have used before, which helps promote other classes on your schedule that utilize the same tool.

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A Stable and Unstable Warm-Up

December 17, 2008

If you’re like a lot of instructors, you tend to use the same warm-up over and over, regardless of the class. By adding a new piece of equipment like the BOSU Balance Trainer, you can turn an old warm-up into a fresh challenge for participants. You also expose students to equipment they might not have used before, which helps promote other classes on the schedule that utilize the same tool. In programs ranging from yoga and Pilates to strength and cardio, there are endless ways to use this fun equipment.

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Sample Class: Sweet Sixteen

April 30, 2007

Are you looking for a new way to motivate your step participants? Take it to the next level by using 16-count combinations in your next class. These options are fun, fast and functional. You can insert them
between blocks of 32-count combinations, giving your class a new feel, or teach them as stand-alone choreography. From dance-based to athletic, these short combos provide a challengi…

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