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By Mofilo Team
Published
You've been holding planks until you shake. You've done the 30-day challenges. You see your hold time go from 30 seconds to 90 seconds, but when you look in the mirror, you see little to no change in your stomach. It's frustrating, and it makes you wonder if you're just wasting your time on the floor.
To answer the question 'are planks enough for abs reddit' directly: No, they are not, and the reason has almost nothing to do with how hard you're trying or how long you can hold the position. You could hold a plank for 10 minutes every day and still not have visible abs. The problem isn't your effort; it's the strategy.
Here’s the breakdown of why this popular exercise, when done in isolation, falls short.
This is the most important rule of aesthetics, and it's non-negotiable. Visible abs are not a sign of a strong core; they are a sign of a low body fat percentage. You already have abdominal muscles. Everyone does. You just can't see them.
For men, a six-pack typically starts becoming visible at around 15% body fat and gets sharp and defined closer to 10-12%.
For women, ab definition usually starts appearing around 22% body fat and becomes more prominent under 20%.
Planks burn a tiny number of calories-roughly 3-5 calories per minute, depending on your weight. You would need to plank for over 15 hours straight to burn a single pound of fat. It is an incredibly inefficient tool for fat loss. The only way to lower your body fat is through a sustained calorie deficit, which comes from your diet.
Muscles grow (hypertrophy) when they are forced to overcome resistance through a full range of motion. Think about a bicep curl: you contract the muscle to lift the weight and lengthen it as you lower it. This process creates micro-tears in the muscle fibers, which then repair and grow back stronger and bigger.
Planks are an *isometric* exercise, meaning your muscles are contracting but not moving. There is no lengthening or shortening phase. While this is excellent for building core stability and endurance, it's a very poor stimulus for muscle growth compared to dynamic movements.
Your main ab muscle, the rectus abdominis (the "six-pack"), is primarily designed for spinal flexion-crunching your torso forward. Planks don't train this function at all. They mainly train the transversus abdominis, a deep core muscle that acts like a weightlifting belt for your spine.
Being able to hold a plank for 3 minutes doesn't mean you're building more muscle than someone who struggles at 45 seconds. It just means you have better muscular endurance. After about 60 seconds, the challenge is no longer about strength; it's about your ability to resist fatigue.
This is a dead end for muscle growth. You wouldn't try to build a bigger chest by bench pressing an empty 45-pound barbell for 100 reps. You would add weight. The same logic applies to your abs. Holding an easy plank for longer is the equivalent of doing endless reps with a weight that's too light. It stops being effective.

Track your ab exercises and weights. See the proof you're getting stronger.
So if planks alone don't work, what does? The formula is simple and has only two parts. If you nail both, results are guaranteed. If you miss either one, you will stay stuck.
This is 80% of the work. You must create a consistent calorie deficit. There is no way around this.
A sustainable starting point is a 500-calorie deficit per day. This will lead to approximately 1 pound of fat loss per week. For most people, this means eating between 1,800 and 2,500 calories, but you should calculate your specific maintenance calories and subtract from there.
While in this deficit, you must prioritize protein. Eat between 0.8 and 1.0 grams of protein per pound of your target body weight. For a 180-pound person, this is 144-180 grams of protein daily. This tells your body to burn fat for energy while preserving the muscle you have-including your abs.
Without a calorie deficit, no amount of ab training will ever reveal your abs.
This is the other 20% of the work. To make your ab muscles grow thicker and more prominent (so they can be seen at a slightly higher body fat percentage), you must challenge them with increasing resistance. This is called progressive overload.
For planks, this means you stop focusing on time and start focusing on intensity. Once you can hold a perfect plank for 60 seconds, it's time to make it harder. Do not just hold it for 90 seconds.
Here’s how to apply progressive overload to planks:
This principle applies to all ab exercises, not just planks.

Every set and rep logged. Proof your core is getting stronger and more defined.
A well-rounded core isn't just about planks. Your abs perform several functions, and you need to train them all. A good routine hits stabilization, flexion, and rotation. Here is a simple and brutally effective routine you can do 2-3 times per week at the end of your main workout.
Rest 60-90 seconds between sets.
This is where you use the plank correctly-as a strength-building stabilization exercise. Forget about time. Focus on tension and load.
This targets the rectus abdominis, the six-pack muscle itself. Unlike bodyweight crunches, the cable allows for easy progressive overload.
This targets your obliques, the muscles on the sides of your torso that frame your abs and contribute to a powerful, athletic-looking core.
Building visible abs is a marathon, not a sprint. The fitness industry sells "30-day ab transformations," but that's not reality. Here's what a real timeline looks like for someone who is consistent with both diet and training.
You will feel your core getting significantly stronger. Your weighted plank holds will improve, and you'll feel more stable during big lifts like squats and deadlifts. If your diet is dialed in, you could lose 3-5 pounds of fat. You will not see your abs yet, but you are building the foundation.
This is where the first signs of progress appear. You might start to see the outline of your upper abs, especially in good lighting. Your obliques may start to show some definition. You'll be consistently adding weight to your ab exercises. If you started at 25% body fat, you might now be down to around 20-22%.
For those who remain disciplined, this is when a clear four-pack or six-pack emerges. This is the direct result of getting your body fat down into the target range (around 15% for men, 22% for women) and building up the ab muscles so they "pop." The definition you see now is the reward for months of consistent, unglamorous work.
Aim for 30-60 seconds with perfect form. If you can easily hold a plank longer than 60 seconds, you are not building muscle effectively. You need to make the exercise harder by adding weight or choosing a more difficult variation, not by adding more time.
Incorporate planks into your ab routine 2-3 times per week on non-consecutive days. Your abdominal muscles need time to recover and grow just like any other muscle group. Training them every day is counterproductive and can lead to burnout or injury.
No, planks are unlikely to give you a blocky waist. They primarily strengthen the deep transversus abdominis, which acts like an internal corset and can help create a tighter, more streamlined midsection. Exercises that can contribute to a blockier look are heavily weighted side bends, when overdone.
The single best variation is the weighted plank, as it allows for simple, measurable progressive overload. Other excellent choices for increasing difficulty are long-lever planks (walking elbows forward) and single-arm planks, which challenge your stability and oblique strength.
Crunches and planks train two different, essential functions of the core. Crunches train spinal flexion (building the visible "bricks" of the six-pack), while planks train anti-extension and stabilization. A complete, functional, and aesthetic core requires both types of training.
Planks are a good exercise, but they are just one tool for one specific job: core stabilization. They are not a magic bullet for a six-pack.
Visible abs are the result of two things: a low enough body fat percentage to see them, and strong enough ab muscles to be worth seeing. Focus on your diet to handle the fat loss, and use a complete, progressively overloaded training plan to build the muscle. That is the only path that works.
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