Next Level Strength

The Ultimate Rings and Parallettes Program

"Al and Danny cut to a depth that most calisthenic practitioners will never reach. What you have before you is a well researched, practical approach to achieving your fitness goals through bodyweight training, produced by the experts in their field." 

—Jeff Cavaliere MSPT, CSCS 


"In Arnold's classic book, The Education of a Bodybuilder, Arnold stresses the importance of bodyweight training. His insights are brilliant, correct and... completely ignored. Danny and Al once again remind us of the need for bodyweight training in their new book, Next Level Strength.

I have been using the techniques that Danny and Al have taught me personally and I continue to make progress well after the age of sixty. This is amazing information brought to you by two of the best people I know."

—Dan John, Author of The Hardstyle Kettlebell Challenge



"Next Level Strength takes all the power of old school calisthenics and blasts it to a higher level!

Just when I think the Kavadlo library of advanced calisthenics cannot possibly be improved upon, they raise the game for everyone else! Next Level Strength is brilliant...make no mistake: this is the ULTIMATE manual on using rings and parallettes as old school calisthenics tools. As I've gotten older I've found myself utilizing the techniques in this awesome book more and more...the result has ALWAYS been the same: old aches and pains vanish, my joints heal, I gain fresh muscle, and I make breakthroughs in total-body strength.

If you have seen rings and parallettes in gyms and were wondering how to use them to take your training to the next level quickly and safely, or if you are just looking for new tools to explode your athleticism beyond your old limits, Next Level Strength belongs on your bookshelf! 10/10!"

—Paul "Coach" Wade, Author of Convict Conditioning


"Danny and Al Kavadlo have truly taken their already masterful bodyweight strength instruction to the next level with Next Level Strength. Rings and parallettes are great training tools, but the genius of this book is in the exercise selection and progressions. The program is accessible to the beginner, while giving the advanced trainee all they can handle. Most importantly, the program is fun and goal oriented, and will be in regular rotation with my own training. The Kavadlos always set the bar high with the quality of their books, and I think this one will become my favorite, which is saying a lot. Next Level Strength should be on the bookshelf of any serious student of strength. Highly recommended!"

—Dr. Chris Hardy, co-author of Strong Medicine

Al Kavadlo of New York, NY

Al Kavadlo, CSCS is one of New York City's most successful personal trainers. Al has worked with all types of clients, including athletes, models and Olympic athletes. He is recognized worldwide for his advanced bodyweight feats of strength and is the leader of Dragon Door's globalcalisthenics certification program.

Danny Kavadlo

Danny Kavadlo is one of the world's most established and respected personal trainers. He has been featured in the New York Times, Men's Fitness, and on television's 20/20. Danny has worn many hats in the fitness industry. As a personal trainer, he's helped clients of all fitness levels and lifestyles, including athletes, models, celebrities, and everyday professionals. As a fitness manager, he's mentored and developed scores of trainers, and directed dozens of corporate seminars.

Marketing & Publicity
  • Authors of nine previous bestselling fitness titles with Dragon Door Publications.
  • significant social media following.
  • Lead trainers for Dragon Door's global calisthenics instructor certification programs.