You?
If that's the case, grab a similarly shaped kettlebell and work hard as this old standby helps transform you into a lean, mean exercise machine.
Kettlebells resemble cannonballs with handles, and they can be used to do a wide variety of exercises that hit the entire body and work the cardiovascular system.
They date back hundreds of years to Russia, according to Ryan Toshner, a certified kettlebell instructor in Brookfield, Wisconsin. Kettlebells were popular in the United States in the late 1800s and early 1900s, and then fizzled out, but are now returning to popularity, he said.
And exercisers are loving it.
Kettlebell workouts are different from traditional free weights and machines: they're fun and they have variety, Toshner said.
Women especially like that the kettlebell moves hit so many lower body muscles; specifically hamstrings and glutes.
"The ratio of women to men in my classes is 70 to 30. But guys who get into it find out you can get really, really strong," he said.
"And once people do it they start to realise how quickly they can get results."
She lost 4.5kg in the first five to six weeks, her fat percentage went from 30 to 21 in about three months, and she saw major changes in her lower body.
"My muscle mass increased and my fat percentage decreased. And I found I could fit back into my old jeans; that was the biggest change," she said.
Lutze said she previously did Pilates or weight-training three times a week.
"Before, I did one muscle group at a time, for the most part. In these classes you're working multiple muscle groups and also doing cardio, which is why I think it's so effective," Lutze said.
Notice the changes
Toshner said he also made gains when he started working with the bells.
"I was a gym rat before. I used traditional weights," he said.
"I'm stronger now and in better shape. There are things I can do now that I never thought about doing three years ago."
Training with kettlebells burns 60% more calories than traditional weight-lifting, according to research by Michele Olson, professor of exercise science at the Human Performance Lab at Auburn University in Montgomery.
Because many exercises can be done with either the kettlebells or free weights, she created a workout video in which exercisers can use either piece of equipment.
Fitness commentator Keli Roberts said kettlebells improved "functional total body movement and strength in terms of power endurance", and were good for balance, stabilisation and cardiovascular conditioning.
She said she especially enjoyed the power and ballistic movements because they "have good transfer into movements you would do in real life. They're good for you because people have trouble getting off the floor".
Kettlebell workouts were suitable for exercisers of all levels because they could choose from a variety of moves and weights, she said.
How to use them
Examples of moves that might be done in a workout include the Turkish get-up, the pistol and the swing.
In the Turkish get-up, exercisers start on the floor, gradually move to standing position, and then gradually return to the floor.
Toshner said it takes 30 seconds to do one repetition because it consists of a series of moves that hit all the muscles in the body.
The pistol is an advanced move that hits quadriceps, works balance and requires lots of hamstring strength. It is similar to doing a squat with one leg, while the other leg is extended.
When doing the swing, exercisers swing a kettlebell between their legs using momentum - something not typically recommended in other forms of exercise. This exercise also works all the muscles in the body with a focus on hamstrings and glutes. It builds strength and stamina.
"Fifteen to 20 swings and your heart rate is up," he said.
But using momentum in the swing or other kettlebell exercises was always done in a controlled fashion, he cautioned.
"Control is the big thing. Fast doesn't mean sloppy. This is all about being strong and being stable and doing things safely."
Because these exercises are so different, getting professional help is a must, Roberts said.
"You should make sure you do it correctly. Done incorrectly, it can hurt you, especially when you start to do power movements," she said.
"Your posture and alignment has to be perfect. There is not a huge margin for error."
Kettlebell: an exercise and a sport
The kettlebell looks innocent enough.
Almost like, as its name suggests, it could steam and chirp cheerfully each morning on a stove top.
A black handle curves to attach at two points to a brightly-coloured bulbous weight. When gripped by hand and swung rapidly through the legs or hoisted above the head, the kettlebell's true potential as an exercise aid emerges.
Kettlebell is both a workout and a competitive sport with Russian roots. It aims to build solid movement skills and train the entire body as an integrated unit. Compared to lifting dumbbells, the kettlebell seems to soar fluidly as one move links to the next.
The bells are portable, so they can be used indoors during the winter and outside in warmer months.
The workout provides both cardiovascular and strength training.