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ACE certified personal trainer

Mark de Alexander lightening bolt

Verified 21 Reviews
location-iconOutdoor & In-Home location-iconVirtual
vaccinated COVID-19 Vaccinated

About Mark

My expertise is based on the highest academic education + 15 years experience. I am devoted to enhance people's life quality.


- Master of Science in Kinesiology, Stockholm University.


- Associate Degree in Nutrition, University of Milan.


- UCLA Fitness Graduated 


- ACE Seniors Fitness Specialist


- ACE Functional Training Specialist


- ACE Certified Personal Trainer


- Former track and field 100m pro athlete.




- Exercise/nutritional routines that allow being healthy and fit long term preventing injuries.


- Strength/conditioning plans that modulate resistance, aerobic, power, flexibility and mobility training.


- Experienced in seniors training


- Nutrition counseling with emphasis in performance nutrition.


- Weight loss / weight gain


- Injuries prevention


- Joints health 


- Corrective exercise, posture, balance


- Sleep coaching 


- Tennis conditioning 


- Running conditioning


- Performance nutrition  



My favorite client story

From obesity to NYC marathon.

My favorite exercise

Anything that involves functional athletic movements.

My favorite quote

Every finish line is a beginning. Dream it, do it.

My training philosophy

My goal is to make my clients healthier persons, better athletes and look better.
I prioritize joints health, injury prevention, functional strength, core endurance, mobility and agility.
Tailor made nutritional plans are essential to achieve the desired goals.

My training experience

Love this job since 2006.

Areas of Expertise

  • Core and Balance
  • Nutrition
  • Strength Training
  • Weight Loss
  • Flexibility and Mobility
  • Functional Training
  • Sports Performance Training
  • Myofascial Release
  • Cardiovascular Conditioning
  • Injury Prevention
  • Muscular Definition
  • Muscle Gain
  • Posture
  • Kettlebells
  • TRX
  • Kickboxing
  • Cross Training
  • Stress Reduction
  • Wellness
  • Corrective Exercise
  • CrossFit

NCCA Accredited Certifications

ace certification ACE Certified Personal Trainer
ace certification ACE Certified Personal Trainer


ACE Functional Training Specialist, ACE Senior Fitness Specialist

Who I Especially Like Working With

Actors, Bariatric, Beginners, Bodybuilders, Brides-to-be, Cancer Survivors, Dancers, Law Enforcement, Men, Middle-aged, Models, Overweight/ Obese, Post-rehab, Pre/post-natal, Runners, Seniors, Women, Youth

Medical Conditions Experience

Anxiety, Arthritis, Back Pain/Issues, Bone/Joint Injury, Diabetes, Hip Pain/Issues, Hypertension, Hypothyroidism, Joint Pain, Knee Pain/Issues, Limited Mobility, Lower Body Pain/Issues, Menopause, Neck Pain, Obesity, Osteoporosis, Piriformis Syndrome, Plantar fasciitis, Prediabetes, Rotator Cuff Issues, Sciatica, Shoulder Issues, Stress

Great first time. Mark showed up on time and ready to start my program. He is very knowledgeable and I'm confident I'll reach my goals under his direction.

Jonathan Yepez

Marco is an amazing trainer, his knowledge of fitness, nutrition and wellbeing has really helped us gain strength and stay committed. Marco is very amicable, and spent the time to understand our strengths and weaknesses and has developed a very strategic and impactful routine that suits our individual needs and goals. We highly recommend Marco to anyone who is looking for a personal trainer.

Ben H.

Great experience. Mark is professional, knowledgeable and a great listener. Loved how he spent time assessing my weaknesses and my strengths. Recommended!

Chloe S.

Mark is the coach I was looking for. I wasn’t able to workout for one year and I got hips issues. Mark identified my problems and tailored a fitness plan to achieve my goals.

Elizabeth W.

Mark is easygoing, attentive, professional, and very knowledgeable about every aspect of wellness. He has a science based approach and he even gave me very helpful recommendations to improve my sleep quality.

Claire B.

I’m planning to restart playing tennis improving my athleticism. Mark is the ideal coach for that. Very knowledgeable in sports conditioning and everything fitness related. Amicable and professional.

Matthew L.

Excellent experience. Mark is always punctual and spend time even after the session to make sure I stretch properly. Great communication skills, easygoing and professional. Recommended!

Sofie A.

I had an knee surgery 5 months ago and I needed to lose lot of weight. Mark is really a great trainer. He is a great listener, meticulous and motivates you without being a sergeant. Very knowledgeable in nutritional strategies. Great experience!

Brooke N.

Mark is great. I had a serious hip injury while ago and I need to strengthen my legs. Mark prioritizes injuries prevention and he made a meticulous assessment of my weaknesses. Really professional and easy to talk to. Strongly recommended.

Kim Z.

Really great first week. Mark is attentive and truly passionate about his job. He’s knowledgeable and amicable. I’m confident I will achieve my goals with him.

Ashley W.

Really great. I’m restarting working out after long time and a shoulder injury. Mark carefully assessed my weaknesses and made a very detailed plan to achieve my goals. He’s supportive and very knowledgeable about nutrition. Strongly recommended!

Jessica M.

I’m having a great experience with Mark. He’s really dedicated to his job and a great motivator. He brings something new to every session! Genuinely amicable and very knowledgeable.

Ken M.

I suffered a serious knee injury because of a negligent trainer. Mark prioritizes injury prevention and joints health. Very attentive. Strongly recommended!

Abigail L.

Mark is knowledgeable, professional and easy going. He cares about every detail. Supportive and motivating. Highly recommended.

David A.

Highly recommended. I need to lose some weight for my wedding coming in 2023. Mark is a great listener and encouraging. He made me feel comfortable and ready to start my journey. He’s fixing my diet with simple tips.

Brittany C.

Awesome! My goal is to run my first marathon. I needed someone who can prepare me mentally and physically. Mark is great. He challenges and motivates you in a perfect way. Very competent about nutrition. Recommended!

Laura G.

Amazing. Mark is professional and knowledgeable. He makes nutrition easy to understand. Always available for any question I had. Recommended!

Grace F.

Mark is always punctual and dedicated to his profession. Great feedbacks for each exercise. I feel comfortable and motivated during his workout sessions. Expert in post rehab and joints health.

Hannah H.

Highly recommended. Thanks to Mark I’m getting rid of my lower back and spine issues. His workouts are always engaging, never a bore. Great positive attitude. Inspiring. I finally found a real professional after several bad experiences with other “trainers”.

Adam V.

When I started with Mark I was 20 lbs overweight with shoulder issues. He designed a customized exercise routine to strengthen my shoulders without injury risk. He is motivating me to push past my perceived limits in a safe way. Extremely professional and great conversations! Thank you for being so patient with me!

Emma R.

I was skeptical about finding a personal trainer on line but I’m glad I gave it a try. Mark is just great. He’s always positive and supportive. Genuinely a nice person. He’s fixing my pre workout meals and I’m already seeing results. Much less bloating! Strongly recommended!

Olivia J.

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