Understand and learn the chop in table tennis: defence with backspin from far behind the table, with technique, tactics, mistakes and FAQ.
The chop (backspin defence) is a defensive stroke you play far behind the table with heavy backspin. You defend against topspin attacks by bringing the ball back low, slowly and with backspin, and thus let the opponent's attack run into nothing. The English federation coaches list as defence "defensive stroke used away from the table (either chop or float)" [1].
The honest answer to "is the chop an outdated model?": at the top it is becoming rarer. In 13 men's singles of the 2019 World Championships the share of chop strokes decreased from the middle to the ending period; at the end of sets players chose more offensive stroke types [2]. The authors of an analysis of the best women see, with the larger plastic ball, more strokes in the "stalemate phase" and suspect less spin [5]. At the same time, in an analysis of 48 players women used more defensive strokes while men played more offensive strokes (especially flips) [3]. In short: the chop is not standard, but it is a distinct style of play with its own tactics.
A note on context: I found no dedicated study on the biomechanics of the chop itself. What research offers is the attacker's side: against backspin advanced players adapt racket angle, not stroke path [4], and elite players play the topspin loop against backspin more economically and with greater similarity of movement patterns than amateurs [6]. That is your opponent when you chop.
Typical for the chop: it is a game of patience. You rarely win through a single stroke but through many safe balls that make the opponent err. That also means you need fitness: longer rallies mean more running and more strokes per point (practical experience). How long does it take? You learn the basic movement in a few sessions. Until you vary length, spin and rhythm over a whole match, expect months to years (practical experience, not a study).
Go one to two metres behind the table, weight on the balls of the feet, racket high. The distance gives you time to read the ball. The federation coaches distinguish defence from the push: the push is the defensive technique close to the table, the chop far away [1].
Milestone: On 8 of 10 topspins you are already in position before the ball crosses the net.
You hit the ball as it falls from top to bottom and brush it. The racket face is slightly open; the backspin comes from friction. Advanced attackers adapt to different spins via racket angle [4] – if you vary your angle and the strength of your cut, you force them to adapt.
Milestone: 6 of 10 chops bounce short after the table with visible backspin (partner reports it).
Alternate between long and short backspin, between heavy and light cut. Variation takes away the opponent's rhythm. Over the course of the match chops decreased for men [2]: the opponent learns to read you, so you must change.
Milestone: In 10 chops you play at least four different lengths/cuts.
In the chop footwork is decisive because you stand far from the table. Side step and one-step have different load profiles [8]; especially in long rallies you alternate between the two.
Milestone: After 8 of 10 chops you are back in the base position.
If the opponent comes too short or too high you attack yourself. The chop is a means to force the opponent into errors, not an end in itself. A survey of top coaches classes defence as its own group of technical-tactical elements that works together with preparation, attack and counter-attack [9].
Milestone: In a set you use at least two deliberate attacking strokes.
Use the plastic ball: with the change from celluloid to plastic the behaviour of serves with backspin and of topspin drives changed [11]. Test with your training partner how much cut your ball really carries in training and adjust your racket face accordingly. This is a practical recommendation, not a study.
A defensive stroke far behind the table with heavy backspin. The English federation coaches list it as defence ("chop or float") [1].
At the top it is becoming rarer. In an analysis of pro men the share of chops decreased over the course of sets [2]. But it is a style of play of its own.
The push is played close to the table, the chop far behind it [1].
Long rallies load back, knee and hip; footwork and warming up are important [10].
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