Depending on your goals, high volume work can be beneficial and have you building a solid physique. There's nothing particularly wrong with doing workouts that go high up in reps but there are drawbacks just like anything else. High Volume can be time consuming even if you do them throughout the day so it's important to be wise with what you're willing to do.
Bodyweight exercises are specifically more geared to high volume training since you're using nothing more than yourself as resistance. Doing exercises like Squats, Push-Ups, Sit-Ups, Lunges and others work well for this and they can be done anywhere, anytime. Two distinctive athletes that did well with High Volume in this manner was the Great Gama & Herschel Walker, both excelling in their chosen sports of Wrestling & Football. They were doing repetitions well into the thousands almost daily and had success in that manner. The drawback to this is, not everyone can do thousands of reps everyday and they've got lives that do take up some of their time like work, kids, all kinds of things. These 2 men lived on training and were practicing stuff all the time so when it came to their conditioning, they had to maintain that elite level and not do a whole lot of anything else.
When it comes to weight training, this was more along the lines of bodybuilding from guys like Arnold, Lee Haney, Lou Ferrigno, Robbie Robinson and others who trained more than 3 hours a day along with their diet, maintaining steroid cycles, recovering and other things. For a regular guy, it's not the most ideal but if it helps them and they make that kind of commitment, it can work well in their favor. It takes a different mindset to train this way. Wrestlers are known well for their conditioning and doing rep after rep of calisthenics, weight training, drills and other forms in order to take on incredible extremes. Dan Gable was a master at this and during his coaching career, he pushed athletes in ways that other colleges didn't have. It's the reason he won 15 NCAA Championships as a coach and dominated college wrestling with fierce competitiveness. High Volume work does work in ways we can't imagine.
The cons to doing high volume work in many cases is the risk factor of injury. The more you do, the greater the risk. The other thing is that some who do high volume, aren't always in control of the movements themselves. They tend to screw the form and be explosive which has its own pros and cons but in this case, if you do too many reps that aren't complimentary to the movement, you can cause some serious damage. Doing a thousand squats and push-ups a day can work for a while and some people can get away with it but others have had joint problems, muscle tears, bad knees and shoulder issues due to high volume work. It can take a toll especially if you can't recover enough and you keep doing it over time. Some people go to extremes and think they're fit enough to withstand certain levels of stress. Doing exercises like Burpees in the hundreds is far from anything beneficial other than making some kind of record. There's no value in it that can have you sustain a good quality of life. The exercise itself is very exhausting and works many muscle groups at the same time and has a higher risk factor for damaging joints. Now if you were to do this exercise a couple times a week using intervals that are reasonable, that's more beneficial and less daunting plus there's better form of recovery.
It is important to be wise in order to make high volume work well for you. I do it with exercises like Step Ups, Circuit Training and using the Chest Expander but I don't go so far as to do them for so long its going to burn me out or hurt me which I've learned the hard way. It's not worth your health to do high volume to impress anybody or think you can train the same way as a pro athlete or an Olympian. They go through rigors of training you don't see in the magazines or on the news or sports channels, it's hours upon hours of countless repetition in order to perfect the craft, the majority cannot do this especially for years on end. Be mindful in how you go about it and listen to your body. Some days, you won't always have it and pushing so hard in order to prove something becomes ego training instead of practicality and sustainability.
The pros of high volume in my opinion is that they can give levels of conditioning and endurance that would put you above many and with the right recovery and having good joint health, it can get you into incredible shape and do things that many can't. Strength lasts longer and you're going that extra mile making things happen. It's just a different level of training, that's all it truly is when you look at the big picture. Many can go long and do well with it but it's not for everyone and that's ok. You do what works best for you and makes you successful. If it's high volume, awesome and keep killing it but don't make it a dogmatic approach and tell people that's the only way to train, that's a sales pitch and more about ego than anything else.
