Performance, materials and clinic-practice editor

Marc Oberst

Sports physiology first, then podiatry and materials. He measures a surface before he calls it beautiful.

Youth culture and sensory design

PLA snaps. The leaf on the carton does not catch it.

Unmodified polylactic acid is brittle beside toy-grade ABS. Lignin stiffens the melt. Impact modifiers, drying, and EN 71-3 on the coloured compound are the buying lines.

Marc Oberst · 2026-11-19

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Youth culture and sensory design

A weight the hand can read, and a flasher that should have stayed off

Proprioception wants mass in grams and an edge inside EN 71-1. Plasticisers, small parts and a buzzer held to the ear undercut the object the carton is selling.

Marc Oberst · 2026-11-18

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Performance and body tech

The boot moves blood. The app names it a flush.

Intermittent pneumatic compression can raise venous return and drop a calf measurement for a while. Lactate strips, lymphoedema claims and a one-sided swelling do not belong on the menu.

Marc Oberst · 2026-11-09

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Performance and body tech

Below ten degrees, the blood answers before the mood does

Cold water raises norepinephrine and can ease next-day soreness. Regular immersion straight after strength work can blunt the adaptation the session was built to start.

Marc Oberst · 2026-11-08

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Performance and body tech

The sting is salt. The serum level is a different door.

Magnesium chloride on warm skin irritates because it is concentrated and charged. Oral salts are the route that can raise a low store. The spray after training has a narrower job.

Marc Oberst · 2026-11-06

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Spa and neurocosmetics

The stone moves fluid. The bone stays where it was.

A light glide on oiled skin can shift a soft puffiness for hours. Petechiae report the dose. Fibroblasts in a culture dish are reading a different stretch.

Marc Oberst · 2026-11-05

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Spa and neurocosmetics

Cold on the cheek, and the vessels that answer first

A short subzero pass can blanch skin and briefly quiet a soft puffiness. Raynaud, cold urticaria and an unclear nodule end the session before the nozzle moves.

Marc Oberst · 2026-11-03

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Podiatry and nail health

Callus is a map: the shoe, the shear, the peak you did not move

Plantar hyperkeratosis follows repeated pressure and shear. Debulking without an orthosis or a wider shoe brings the horn back in about four weeks, on the same coordinate.

Marc Oberst · 2026-10-26

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Podiatry and nail health

Green nail in the salon: Pseudomonas, water, and the gel you leave off

Pseudomonas aeruginosa makes pyocyanin in a damp cleft under lifted gel. Dry work, single-use files and a physician handoff match the organism. Lacquer does not.

Marc Oberst · 2026-10-24

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Podiatry and nail health

Orthonyxie: the brace that spends months so the wedge can stay unbooked

Spring-steel and adhesive braces lift a nail edge out of the sulcus. A hallux plate grows about 1 to 1.5 millimetres a month. Surgery remains the last resort, after force and follow-up.

Marc Oberst · 2026-10-23

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K-beauty and lash architecture

Brow lamination: the week of shine, and the week the cortex snaps

A thiol opens cystine bridges so brows can be set. pH, a timer and full oxidation decide whether week three still has a brow. Keratin films do not rebuild the clasp.

Marc Oberst · 2026-10-21

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K-beauty and lash architecture

Lash lifting: cysteine, cysteamine, and the minute that breaks the fibre

Buffered cysteamine reduces disulfide bonds with less swelling than alkaline thioglycolate. Hold comes from full oxidation and a short time, never from leaving the thiol on longer.

Marc Oberst · 2026-10-18

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Medical beauty

Red and near infrared after a peel: dose, distance, cytochrome c oxidase

Photobiomodulation around 630 and 850 nanometres meets complex IV. Fluence, goggles and the photosensitiser question belong in the aftercare sheet, not in a reel.

Marc Oberst · 2026-10-11

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Medical beauty

Cold plasma in the cabin: bioburden, ozone, and the poster you do not adopt

Cold atmospheric plasma lowers surface bioburden and can settle a wound edge. Rosacea, acne and inflammation as a disease stay outside the advertising.

Marc Oberst · 2026-10-10

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