I may be best known for my work training actors for film roles like "The Wolverine", "Assassins Creed" and "X-Men" but I have also helped thousands of men just like you build muscle, drop fat, plus look and feel amazing.
If you train hard and don't have the results you want to show from it listen up now.
There are a number of key strategies you need to include into your training to pack on size and strength.
This four-step plan provides you with the tools to sculpt your blockbuster body.
Step 1 - Set a goal
The constraints of training an actor for a film mean that goals simply have to be set in stone.
"When I am working on films, one of the reasons we are so successful is we have very clear and defined goals, as well as a time frame set by the director, producers or the studio.
"Specific goals mean we can be well-focused with our training and nutrition and everything can be designed to be highly effective."
The main influence on whether you gain muscle or lose fat is the calories and macros that you consume.
Decide what it is you want out of your training plan, in the same way that an actor needs to gain muscle or lose fat in accordance with their role.
If your goal is to gain muscle mass, you need to eat enough food to hit your calorie surplus. However, if your goal is fat loss, you need to ensure calories are low enough for you to burn the weight off for energy.
"If you don't make concise decisions at this stage, the chances of any major changes are slim."
Step 2 - Pick the right training plan
Training provides the stimulus to drive muscle gain or fat loss. Selecting an individualised workout plan is crucial for gaining results in a timely manner.
"When working on films, we don't have unlimited time to train - this is one of the biggest myths I see about training film stars.
"The truth is, time is limited and so we need to be super-focused with our training to achieve our goals."
David asserts that results are still possible, even if you are presented with the least possible workout time.
"More training doesn't mean better results. I did a survey on my social media recently and the results were incredibly interesting.
"I train just 3-4 days per week - but was amazed how many people said 6, 7 or even 8+ times!"
You shouldn't just exercise for the sake of it. Each workout should feature as part of a wider plan.
This becomes particularly important if you have to cram in a workout around work, family and social life.
David, who has trained some of the world's leading A-list actors, claims that:
"A lot of people just end up training for the sake of training, with sessions not aiding their progress.
"There are two key things that need to be considered when planning your training:
1. Every session needs a clear purpose
2. Your training and nutrition need to be balanced perfectly for you and your goals."You don't need hours and hours of training to see amazing results, but you do need to implement methods of tracking your progress, so every session counts.
Keep a training log. You don't necessarily have to train with a paper, book and pen like many used to.
Nowadays, it's perfectly possible to enter into your phone the weights you're lifting, exercises performed and rep range used.
Step 3 - Create your ideal diet
Planning and tracking are particularly important in the context of your diet and nutrition. Kingsbury states:
"Occasionally, on film projects we do have the luxury of private chefs, but "healthy" eating alone doesn't mean progress.
"It's not just about eating healthy, however. You can lose weight eating healthily, but you can gain weight too.
"What matters more than anything is eating the correct number of calories and right macros to achieve your goals."
A diet only works if you do. The best diet is one you can adhere to.
Calculating your calorie needs is where to start, but this is often missed by many. It is the base point from which film stars base their diets.
"Most people massively overcomplicate the way they eat"
"People go paleo, cut out bread, intermittent fast, go keto, or swap meals for horrible meal replacement shakes".
These are all extreme methods, but if you get the basics of calorie intake nailed, you can enjoy a fairly balanced and flexible diet.
"Just make sure you are consuming the right amount of calories for your goals. Then, the next most important factor for nutrition is your macronutrient needs."
The three main macronutrients are protein, carbs and fat.
You'll need the right ratio of these to build your ideal body.
"Get your calories right and your weight will move in the direction you want - but get your macros right and your body composition will change in the way you want."
The American College of Sports Medicine (ACSM) recommend at least 1.6 grams of protein per kilo of bodyweight each day, in order to build muscle.
Even if mass gain is not part of your wider plan, a high protein intake is optimal for fat loss as it is the food group which burns the most fuel when digested.
Step 4 - Stir positive pressure
When I train actors for a Hollywood film, I use positive pressure as a vehicle to achieve results.
"A concept I use with actors is - If I told you that your shirtless torso would be on billboards in every major city how would you feel?
"This would usually keep actors pretty focused, to say the least. This type of pressure may seem quite extreme, but a certain amount goes a long way."
A certain amount of positive pressure goes a long way - here are some ideas for you:
Weekly check in with a coach for accountability
Publicly announce your goals
Publicly announce your progress
Use social media for progress updates and to keep you on track
Partner up train with someone to create competition and accountability
Set a challenge with a fixed date photo shoot, obstacle race, marathon, holiday, whatever it might be
Use this list and the training and nutrition advice to make superhero progress