I'm affixing Kenny Croxdale's fantastic post here on the cardio etc benefits of kettlebell swings. I think this synches the question entirely! Kettlebell swings are ideal for cardio and beyond! Fantastic! Problem solved!!!
High Intensity Interval Cardio Training
Kettlebell Swing fall into the "Strint Training Category". Specifically, they are
High Intensity Resistance Interval Training.
It's Real Cardio
High Intensity Interval Resistance Trainingn (HIIT) produces the same cardio training effect as High Intensity Interval Cardio Training (HIIRT)
1) Aerobic/Anaerobic Effect: Paradoxically, HIIT and HIIRT cardio training increases both your Aerobic and Anerobic capacity.
Steady State Cardio only increases your Aerobic Capacity.
Research, in one of several studies, demonstrated that HIIT increased VO2 Max more than Steady State Cardio...
(Medicine and Science in Sports and Exercise (1996) 28, 1327-1330)
Forget the Fat-Burn Zone
The
moderate-intensity endurance training program produced a significant increase in V02max (about 10%), but had
no effect on anaerobic capacity. The
high-intensity intermittent protocol improved V02max by about 14%; anaerobic capacity increased by a whopping 28%.
Dr. Tabata said, "The fact is that the rate of increase in V02max [14% for the high-intensity protocol - in only 6 weeks] is one of the highest ever reported in exercise science." (Note, the students participating in this study were members of varsity table tennis, baseball, basketball, soccer and swimming teams and already had relatively high aerobic capacities.)
Grasping Training Concepts
A monumental key to writing a great Training Program is understand Training Concepts. That means the same cardio vascular benefits can be achieved with Kettlebell Swings, as with Sprint Training. Both are intensive Resistance Protocols.
Summary
1) Research and anecdotal data demonstrate that HIIT and HIIRT increase VO2 Max. It's "Real Cardio".
2) HIIT and HIIRT increase Anaerobic Power; something Steady State Cardio does not.
3) HIIT and HIIRT also increases muscle mass. Steady State Cardio can minutely increase muscle mass. Too much Steady State interferes with Strength, Power, Speed and Hypertrophy Training.
4) HIIT and HIIRT are "Strength Training" for your cardiovascular system, heart and lungs.
5) HIIT and HIIRT increase your "Fat Burning Metabolism"; up to 9 time more than Steady State Cardio via Excess Post Oxygen Consumption (EPOC).
These are some not all of the benefits.
Kenny Croxdale