Many corporate fitness sites also offer unique specialty classes to spark and sustain healthy activity. These classes vary in length — some are 30 minutes; others last 90+ minutes—and some are one-day events, while others last weeks or months.

Finding the right mix

To identify the right mix of corporate fitness classes for an employee population, there are several key initial considerations.

First, it's important to know how to deliver classes in the ways that members need them. For some employers, this means offering a variety of short, 20-minute classes during the lunch hour for time-strapped office workers. Other employers focus heavily on providing before- and after-work classes, as these are high-demand times when many employees participate.

Second, there should be something for everyone, at every level of fitness. For example, a biotechnology employer with a 24,000-square-foot fitness center would offer 91 different aerobics classes each week, ranging from kettlebells to kickboxing and more. Thanks to these tailored approaches, 73% of the 9,200 employees at this site are members and 43% of the membership participates six or more times per month.

And third, keep in mind that cost-effective delivery of programs is essential to ensure accessibility. When group exercise classes are offered at employer sites, some could be free while a specialty class could be as low as $12 per session for members or $20 for non-members.

As an additional perk, when a corporate fitness center does offer the right mix of specialty classes, it can pave an inroad with non-members, luring them into the center to experience how great it feels to be fit at the workplace.

Based on employee demographics and interests, here are seven examples of trending specialty classes that employees love right now:

1-Hula Hoop

This retro toy has resurfaced as a popular new way to enjoy exercise. Hula hooping combines elements of dance and fitness to improve coordination, balance, rhythm, strength and flexibility. Hula hoops are provided for this six-week class.

2-Kangoo Jumps

Kangoo Jumps use low-impact rebound boots that decrease impact during cardio activities by up to 80 %. During the six-week class, students wear these boots to bounce, hop, skip and jump, while doing leg lifts, squats and dance moves choreographed to energetic tunes.

3-Thai Yoga BodyWork

In this class, an instructor guides participants through yoga postures with hands-on assistance while massaging muscles and working along the body's energy lines and pressure points. The result is a comprehensive full body treatment that leaves participants feeling relaxed and rejuvenated.

4-Muay Thai Boxing

Muay Thai Boxing is similar to regular boxing but with the addition of kicks, knee and elbow strikes, and various clinching techniques. The eight-week class includes boxing gloves.

5-Ballet Barre

Ballet Barre is a low-impact, full-body workout that combines ballet and Pilates-style movements. Designed to build long, lean, toned muscles, this four-week class is a fun, challenging fusion of fitness and dance.

6. Weeks to Better Posture

This series uses strength and flexibility exercises to strengthen abdominal and back muscles, develop pelvic stability and build abdominal control. Participants create a mind/body awareness through focused, slow, careful and controlled exercises that improve posture.

7. Foam Rolling

This class creates deep dynamic strength and core support while releasing tight, painful areas of the body. Participants learn how to provide their own muscle relief and decrease muscular soreness. The four-week class includes the foam roller.