#95–Luke Bennett, M.D.: Emotional, cognitive, & physical demands that make Formula 1 a special sport

The physical demand shifted materially in 2017 when the cars became much faster and generated significantly more downforce and grip, increasing G-forces through corners. The Hans device (head and neck support) protects the cervical spine in impacts by limiting extreme flexion, but it does not reduce the chronic isometric loading during normal cornering - that is purely neck-muscle dependent. Prior-era cars (V10 era) required more explosive muscular power; current cars require sustained isometric neck and core endurance.

Singapore Grand Prix is structurally the most dehydrating race on the calendar: it always runs the full two-hour maximum distance, has 24-25 corners of mostly slow to medium-speed 90-degree turns, and runs at night in tropical heat and humidity. Bennett notes the driver area after Singapore is quite something to behold - drivers coming in flushed and exhausted with a faraway look in their eyes. Recovery after Singapore is particularly emphasized by his team. The 1.2-1.5L provision for maximum events is a pragmatic compromise between hydration and the weight penalty every additional gram of fluid represents on the car.

Bennett describes the race engineer's complementary role: filtering hundreds of telemetry streams to deliver concise, timed radio messages at the right moment in the lap. The coach and the race engineer are both bandwidth-protection agents for the same cognitive system. Bennett explicitly tries to integrate these two streams, getting the engineers to work more closely with the performance coaches and vice versa - so the performance coach can intelligently communicate which sessions require maximum alertness and which can tolerate lighter cognitive load.

The F1 travel pattern during the final seven to eight race stretch features round-trips to Asia, then the Americas, then Middle East - most personnel returning to Europe between each. The regulatory and logistical constraints (specific flights due to freight and equipment, limited room booking availability) mean ideal chronobiology is simply not available. Bennett's approach mirrors military aerospace medicine: accept circadian disruption as a structural constraint, then minimize its performance impact by protecting sleep quantity by any available means.

Bennett pairs TRE with a little bit of fasting, regular sunlight exposure, and daily movement (aiming for 10,000 steps as part of the paddock workday). He frames the F1 paddock food as an abundance of really palatable excellent food that you can eat quite healthy if you choose to but there are certainly some desserts. The structure of TRE removes the continuous decision-making burden that depletes executive function across long work days. He explicitly distinguishes his approach from Attia's longer fasting experiments - this is a pragmatic sustainable tool, not a longevity intervention.

Bennett cites the scene in the film Rush where the character playing Niki Lauda discusses how he was gifted with a great ass that could detect tire pressure changes - a cinematic distillation of real trunkal proprioception. The practical training implication: even the most data-rich simulator cannot replicate the seat-of-pants signal that tells a driver a tire is dropping pressure before the chassis behavior visibly changes. Attia confirms from personal simulator experience: catching oversteer in the simulator is harder because you don't have that feeling of oversteer that comes before your visual change. Karting produces this signal naturally because the lightweight kart transmits chassis behavior directly through the seat with minimal damping.

Bennett describes his own health management in the context of 40 nights in his own bed per year. He supplements sleep with TRE, daily movement (10,000 steps in the paddock), opportunistic outdoor activity when possible, and sunlight exposure. You could very easily sort of fall off a cliff doing this - meaning the job is structurally hostile to health, and only deliberate anchor commitments prevent degradation.

The physical demand scaled sharply in 2017 when the cars became much more physical to drive - wider, heavier, higher downforce, higher grip, substantially faster. Drivers are in the car for approximately seven hours across a full race weekend. After the race in Singapore, drivers come into the driver area flushed and exhausted with a faraway look in their eyes. The 5-6G on fast high-speed corners like the final sector at Austin means the neck muscles are continuously doing isometric work at multiples of head weight for two hours.

The race engineer's art is filtering hundreds of data streams down to concise, useful communication timed to parts of the lap when the driver can actually process it. The bandwidth excess that great drivers maintain lets them autonomously manage energy deployment from the hybrid system - a quarter to a third of engine power - corner by corner, while also processing strategy. Bennett's coaching staff manages the driver's off-car schedule to protect this bandwidth: media commitments, engineering meetings, and rest windows are all curated so the driver arrives at the car with maximum cognitive reserve.

The practical effect: the drivers are absolutely delighted with this - they have the luxury of being a kilo or a kilo and a half heavier, they can put on more muscle, their nutrition is just not quite the chore the daily misery that it used to be. The rule mirrors the minimum weight concepts in boxing and wrestling that prevent dangerous dehydration weight-cuts. The mechanism of harm here was different: not acute weight-cutting before weigh-in but chronic dietary restriction across a full season of 21 races plus test days.

Three barriers: (1) homologation of fire suits and underwear down to the stitching on sponsor labels makes adding sensors legally complex; (2) teams refuse any device adding even 100 grams; (3) the FIA mandates physiological monitoring only for safety purposes. Bennett is working on devices compatible with the regulations and expects projects next year where more in-car measurement will be possible. Television streaming pressure may ultimately unlock this: broadcasters want real-time physiological data. Drivers themselves resist it as competitive intelligence giveaway.

The calendar is structured by race fees and traditional fixed dates with no geographic logic, so back-to-back races like Mexico-Brazil require quick eastward crossings. Crews face a narrow window to either adapt to the new time zone or not. Bennett's approach is not letting the perfect be the enemy of the good. Beyond acute jet lag, he personally prioritizes seven to eight hours sleep wherever he goes as the primary personal health strategy across 40 nights at home per year.

Bennett frames this as an open research question: I haven't worked out how we could even study this let alone modify it. The feeling is sort of through their back through their legs through the contact that they have with the seat. Karting remains the primary skill-building tool partly because it gives raw, unmediated access to this sensation. Attia's own experience racing confirms the asymmetry: understeer is all visual and trainable in a sim; oversteer must be felt in the trunk first, and that signal is absent in virtual environments.

Bennett describes the paddock food environment as an abundance of really palatable excellent food. TRE combined with a little bit of fasting, getting outdoors, getting in the sunlight, and informal daily movement (10,000+ steps in the paddock as part of the normal workday) constitute his personal protocol. He explicitly distinguishes his approach from Attia's longer fasting experiments - this is a pragmatic sustainable tool, not a longevity intervention.