Jayson Westley Leisenring

Intelligent Intensity

My Process

Training With Jayson

Hi, I'm Jayson Westley Leisenring, JW for short. I'm a trainer in NYC with a passion for improving people's lives through fitness. I have a diverse background: Marathons (3:01 best time), triathlons, Black Belt from TSK MMA, CrossFit, Jiu Jitsu, and more. I also have a lot of certifications: CSCS, CFSC, RKC, FRCms, and more.All this means to you is I have A LOT of tools that enable me to help you achieve your health and fitness goals.

I believe in Intelligent Intensity. Mobility and longevity first as I believe being able to move freely through your hips, thoracic spine, and shoulders is very important and essential to a long, healthy life. Then we build your foundation of strength and increase your cardio and lung capacity.


Mobility is your joint range of motion you can achieve without assistance. I ensure everyone has healthy movement through their hips, shoulders, and T-spines.


We're then empowered by our true movement capabilities and realization that we're not as restricted as once believed. We're free!


Strength training is our foundation.We need to have a strong core that centers us and enables us to create power, strength, and speed.


Breathing is the base which enables us to live.The ease at which your cardiovascular system can pump and transport blood and enhance energy production, and decreases your risk of chronic disease.



Latest Blog Post


Training Videos

Latest Podcast

  • Jayson’s desire to push the boundaries of various training methods, supported by the science behind it and through proper implementation is refreshing in today’s checklist world of workout classes. No two workouts are the same with Jay; however, you’ll always find intensity, purpose-driven movements and one hell of a sweat. Jayson is constantly seeking a better version of himself, as well as his clients – both mentally and physically – it’s contagious.
    David Elliott
  • I have been working with Jayson for just under a year and he has been a true pleasure to work with. He pushes you to the limit when he knows you can handle it, but also knows when to throttle back. He’s extremely knowledgeable about the human body and various different types of exercise. You always feel safe working with him given you’re confident that he’s monitoring and will make sure you don’t injure yourself. I can’t recommend Jayson more emphatically. He’s helped me lose ~25 pounds and we’re still going strong – I haven’t weighed this since high school. Coach Jayson is a boss!
    Jed F. Lenzner
  • NYC probably has more personal trainers than any other metropolitan area in the country. However I can say this with conviction. NO ONE has more passion, respect, knowledge, and commitment than Jayson. “Hey I can only make it if we do 4:30 am.” Jayson: “Let’s Crush it Brother.” You can’t understand J by just “following” him and using his workouts. You need to spend time to fully understand what makes him “tick” – and that’s him seeing YOU achieving YOUR goals you set out in everyday life. Not only have I learned to work out more “efficiently” as a 44 year old man, I more flexible now than I was in my 20s.
    Kevin Weir
  • Jayson is a true professional, in every sense of the word.  I followed Jayson and grabbed workouts online via his Instagram and YouTube channel before I decided to train in-person with him.  That has proven to be an incredibly wise decision.  I chose Jayson because I wanted to try and reach new levels of testing myself physically and mentally.  He has allowed me to do just that, with real tangible results.  Jayson works incredibly hard to make sure that he is constantly challenging himself to be the best possible person & trainer he can be, and I believe that motivates his clients to work even harder.  He puts in the work himself, leading by example and showing his clients just how much passion he has for his work and his client base.  Jayson is real, he is authentic… there is absolutely nothing phony about him.  He will undoubtedly kick your butt in the gym, but he is doing it to make sure you are inching closer to becoming the best version of yourself possible.  I am proud to call him a friend, and thankful that I can lean on him to better myself physically and mentally for years to come.
    Todd Cuccia
  • I get disappointed when customer service reps don't offer customer service. Or when waiters don't wait on you for 15 minutes. Basically, I'm satisfied when people do the jobs they're assigned. I'm downright giddy when people are PASSIONATE about what they do. And I can honestly say I've met few trainers who are as passionate as Jayson. You can tell when someone lives and breathes their job/career. I knew that about Jayson during our first workout; it was either that or he he was crazy. Countless workouts later, I can confirm, it's passion. It's pushing you past what you thought was your limit. It's leaving you feeling like you've climbed a mountain and can conquer the world after every workout. It's soaking up and passing on innovative training techniques that improve his clients' lives. His workouts are so addictive I save them to use on days we don't meet. I know I wouldn't be as strong, as lean, as knowledgeable as I am now without him. Ive lost 20 lbs. for my wedding and kept it off five months later. The teenager in me who couldn't run a mile in high school is forever grateful for the adult contemplating a triathlon that I've turned into.
    Checkey Beckford - Atkinson
  • It's been awhile since I've been able to have a workout with coach Jayson but I still compare every other trainer that I've had to him. I don't know how many times I have walked away from a workout saying "I miss coach Jayson." He will challenge your mind and your body to an extent you don't think is possible (but always is!). He is so knowledgeable on fitness, diet, and the anatomy, that you can't help but forgive him for putting you through such intense workouts! Whether you've been training your whole life or have never exercised, he will change your body in ways you didn't think possible. I love that he is constantly studying the science behind the exercises, that he himself participates in programs to enhance himself (and shares his new found knowledge with his students!), and that he is genuinely interested in helping you attain your fitness goals. He is super positive and encouraging, especially when you feel like your body is giving up. He is an amazing trainer. I was in the best shape on my life when I trained with him and hope that I can find myself back to his insanity.
    Parul Laul
  • Before my friend introduced me to Jayson, I had worked out with a few other trainers, but had never found "the one" (trainer). I found it with Jayson. His workouts are intense, and definitely push you to your limits (or what you think are your limits), but you will absolutely get results. I've been working out with Jayson for a little over a year, and I have transformed my body, losing inches and toning my muscles. His workouts are always different, so you won't get bored. Plus, Jayson really cares about his clients - he takes an interest in not only your workouts and your fitness, but also who you are as a person. I highly recommend working out with Jayson!
    Meredith Cohen
  • If you're looking for a butt kicking workout , while learning proper form and technique , Jayson is your man. You will most likely hate him during the work out, but will feel and look like a million bucks after, especially when you finally see those results you've been trying years to get. If you're looking to be motivated, step out of your comfort zone and get some variation in your routine, I would recommend trying Jayson, he will not disappoint.
    Alyson Leffel