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ACE certified personal trainer

Jacob Kleis lightening bolt

location-iconOutdoor & In-Home location-iconVirtual

About Jacob

Hi, I’m Jake Kleis

I’m a trainer in Cambridge, MA. I have an innate passion for health and fitness that I love channeling to help people accomplish their own goals.

My ideal client is anyone who knows what they want to achieve, has a positive attitude, and works hard. That’s really it.

Everybody has different starting points and struggles, so my training programs are catered to my client’s specific needs. However, no matter who you are or what you do, I use sound, core principles that apply to everyone.

When you train with me, I will show you:
-How to fit a workout routine into your busy schedule and see amazing results in just 2-3 hours per week
-How to properly execute strength training movements to get strong and stay injury-free
-How to utilize progressive overload to consistently get bigger and stronger muscles regardless of your current ability level
-How to build a workout routine catered to YOUR specific goals
-How to train around your existing injuries and still make gains
-How to manage a pain flare up and use specific movements to mitigate it
-How to identify what is useful and what isn’t when it comes to working out
-How to create lasting flexibility in your body
-How to choose healthy foods to eat
-How to cook healthy food without spending hours in the kitchen
-How to grow your knowledge of health and fitness topics
-How to create accountability with yourself
-How to be consistent with your goal and make fitness an integral part of your life

I offer several different modalities of training:
- 1-on-1 personal training at Dirty Water Fitness in Cambridge, MA (spots are limited).
- 1-on-1 partner assisted stretching sessions at Dirty Water Fitness in Cambridge, MA (spots are limited). 30 minute or 60 minute sessions.
- Online training via the app Trainerize. Full custom programming, video demonstrations of exercises, and messaging directly to me via the app.
- Custom, one-time purchase programs catered to your specific goals

Send me a message and I will get you started with a FREE 20 minute consultation in which we will talk about your goals more in-depth and we can design a training program that is right for you. No gimmicks and no commitment to sign up. All I ask in return is that you are serious about training and genuinely want to make a change.

I look forward to working with you,

Areas of Expertise

  • Strength Training
  • Flexibility and Mobility
  • Muscular Definition
  • Muscle Gain
  • Posture
  • Functional Training
  • Injury Prevention
  • Corrective Exercise

NCCA Accredited Certifications

ace certification ACE Certified Personal Trainer


BS in Kinesiology from UMass Amherst

Training Areas Served

In-home or Outdoor Training

Session Surcharge: $0

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