Why Accuracy Matters In sports science, the value of any measurement device ultimately comes down to accuracy. No matter how convenient or affordable a tool is, if the measurements cannot be trusted, they cannot serve as the basis for training decisions. PoinT GO performs a wide range of measurements — VBT, jump, RSI, ROM, isometric testing, weightlifting analysis, and more — all with a single IMU (Inertial Measurement Unit) sensor roughly the size of a fingertip. So the qu

In weightlifting, the line between a made lift and a miss isn't the weight — it's the phases. Even at the same 100kg, if you spend all your force on the first pull from the floor to the knees (1st Pull), the speed won't be there for the second pull (2nd Pull), the very phase that's supposed to be the most explosive. The bar doesn't float high enough, and the catch collapses. To the eye it just looks like "so close," but break the lift into phases and exactly where it fell apa

What Is Olympic Weightlifting? Two athletes are lifting the same 100kg. One records a peak velocity of 1.9m/s in the 2nd Pull, while the other reaches only 1.6m/s. The weight is the same, but the first athlete makes the lift with room to spare while the second barely catches it. This 0.3m/s difference is nearly invisible to the naked eye, yet it separates success from failure. This is why velocity data matters. Olympic weightlifting consists of two events: the Snatch and th

What Is VBT? Have you ever benched 80kg effortlessly one day, only to find the same weight unusually heavy the next? Sleep, nutrition, stress -- countless variables change daily, so is it really rational to keep training loads fixed? Research shows that even the same athlete's 1RM can fluctuate by up to 18% from one day to the next. VBT (Velocity Based Training) solves exactly this problem. By measuring the speed of the barbell or dumbbell in real time, it finds the optimal

Some days the same 80kg felt light yesterday but is unusually heavy today. It happens when you didn't sleep well, when yesterday's training is still with you, or when your condition is a little flat. Yet the training plan only lists the weight. Today's readiness isn't written on the bar. VBT (Velocity Based Training) fills in that blank. By measuring how fast the bar rises on every rep, it shows you in numbers how heavy that weight actually is for the athlete on that day. Ve

Why Throwing Training? No matter how hard you push the bench press, there is never a moment when you release the barbell. The same goes for squats -- you must decelerate at the end of every rep. But what about in competition? The moment a baseball is thrown, the instant a medicine ball slams into the floor -- there is no deceleration. This is the fundamental difference between throwing training and all other forms of training. Throwing training is the only training modality

Lower-body power is easy enough to capture with a jump — but how do you measure the upper body? The force behind throwing a ball, driving a spike, or extending a punch can be decisive in competition, yet if you only judge by eye you end up relying on gut feel. You sense something like "the ball isn't coming off quite as well today," but it's hard to tell whether that's down to condition or an actual drop in power. Throws measurement is a way to put that upper-body power into

A golf driver, a baseball bat, a tennis racquet. The sport changes, but the moment that creates the result is the same one: impact, when the implement meets the ball. How fast the tip of the implement is moving at that instant is what separates distance and exit velocity. Yet this speed is hard to catch by eye or by feel, because it all happens within 0.1 seconds. So it's easy for a coach to lean on the feeling that "that one felt pretty solid." This guide is about putting a

No Single Measurement Fits Every Sport Do a weightlifter and a soccer player need the same most-important quality? Intuitively, the answer is "no." Yet the moment people start measuring, many coaches and athletes fall into the trap of "let's just measure everything." Jump tests, 1RM, rotational power... the data piles up, but they end up not knowing what to look at. The core issue is that the physical qualities a sport demands differ by sport. For weightlifting, the maximal

What Is RSI? Picture a basketball player catching a rebound and immediately leaping back up for a dunk. Or a soccer player changing direction -- the foot is on the ground for less than 0.2 seconds. How much force can be produced in that brief moment? RSI is the number that shows you. RSI (Reactive Strength Index) is a metric that evaluates an athlete's reactive strength by measuring jump height relative to ground contact time. First proposed by Young (1995), this concept is

Picture the moment a foot lands. The first step of a sprint, a cut to change direction, catching a rebound and springing right back up. The foot stays on the ground for less than 0.2 seconds, and how fast an athlete pours force into that brief moment often decides performance. RSI is the metric that puts this "ability to spring back up quickly" into a number. This article lays out, as a field workflow, how to measure RSI, how to read the numbers you get, and how to connect t

In the brief instant you swing a bat, bring a golf club down, or strike a forehand with a racket, most of the power comes not from the arms but from trunk rotation. The force created as you push off the ground with your feet and your pelvis turns travels through the trunk and shoulders and is finally delivered to your fingertips or the implement. That's why how fast and how large the rotation is amounts to the power of the movement. The problem is that you can't see this rot

An athlete whose shoulder won't lift all the way. One whose ankle feels especially stiff at the bottom of a squat. Another whose previously injured knee won't straighten as far as the other side. To the eye, all you get is a vague "seems a bit stiff?" But once you measure it as an angle and put the left and right side by side, the story changes. You can see, in numbers, exactly where the restriction is and how much the two sides differ. That's what mobility (ROM) measurement

The 1RM (one-rep max) is the reference point for any strength program, because you set intensity as something like "80% of 1RM." Yet knowing that 1RM precisely is surprisingly hard. Attempting a true maximal lift means accepting injury risk, and once you've done it you need a few days to recover, so it's hard to test often during the season. As a result, many coaches keep training off a 1RM measured months ago. The load-velocity profile (LVP) solves this differently. Instead

What Is 1RM? "How much do you bench?" -- a question every weight trainer has heard at least once. But attempting a true maximal lift every time to find your exact 1RM carries significant injury risk and requires 5-7 days for recovery. What if you could estimate your 1RM within 2-3% accuracy using just 3-4 submaximal sets? 1RM (One Repetition Maximum) is the maximum weight you can lift for a single repetition. It serves as the standard for assessing strength levels and setti

What Is ROM? Have you ever tried to do a full squat only to have your heels lift off the ground because of stiff ankles, or struggled to press overhead because your arms would not reach beside your ears? These limitations are not just minor inconveniences -- they can be warning signs leading to injury. Research shows that performing squats with insufficient hip ROM increases the risk of lumbar injury by 2.4 times. ROM (Range of Motion) refers to the maximum range through wh

The Importance of Jump Testing The moment a basketball player grabs a rebound, the instant a volleyball player spikes over the net, the split second a soccer player contests a header -- the common thread in all these moments is the jump. Interestingly, vertical jump ability goes beyond simply "how high you can jump" -- it is a metric that can predict sprint speed, agility, and change of direction ability. According to a meta-analysis by Markovic & Jaric (2007), vertical jum

The vertical jump is the most honest expression of lower-body power. Grabbing a rebound, driving a spike, rising for a contested ball in the air -- in that instant, how fast and how hard the legs extend shows through completely. That's why jump height has long been used as a benchmark of an athlete's ability. The problem is that judging "how high did they jump" by eye alone leaves you leaning on gut feel. It's hard to tell at a glance whether an athlete is flat today, whethe

What Is Isometric Exercise? You have probably experienced your entire body shaking after holding a plank for just 30 seconds. Why is it so hard when you are not even moving? Isometric exercise looks simple on the surface, but muscles can be recruited up to 100% during maximal isometric contractions. There is a reason world-class weightlifters use isometric training to overcome sticking points, and physical therapists choose isometric exercise as the first prescription for te

You'll see it in just about any gym: an athlete holding a plank while the coach clicks a stopwatch. But a stopwatch alone can't tell you whether "held for a minute" is good or bad, whether it beats last month, or whether the posture wobbled the whole time or stayed rock-solid to the end. Isometric measurement captures exactly this "holding strength" as numbers — both time and stability, together. This guide focuses on measuring isometrics in the field and reading the results