Tag

Biomechanics

All articles tagged with #biomechanics

Personalized Gait Retraining Matches Drug Efficacy for Knee Arthritis
health18 hours ago

Personalized Gait Retraining Matches Drug Efficacy for Knee Arthritis

Researchers from the University of Utah, New York University, and Stanford have demonstrated that personalized gait retraining can relieve knee osteoarthritis pain as effectively as prescription medication while also slowing cartilage degradation. Published in The Lancet Rheumatology, the study is the first placebo-controlled trial to validate a biomechanical intervention for this condition. By adjusting foot angles based on individual biomechanics, participants achieved pain relief comparable to strong analgesics and showed slower progression of joint damage over a year. This approach offers a potential non-invasive alternative to long-term medication or surgery for the millions affected by osteoarthritis.

When Pulled, the Cell’s Spindle Gets Stronger
science3 months ago

When Pulled, the Cell’s Spindle Gets Stronger

Researchers used microneedles to stress the mammalian mitotic spindle during cell division and found the spindle self-stabilizes under force: damaged midsections are reinforced by more stable microtubule segments, with EB1 tagging marking repair sites. This mechanism helps the spindle withstand the forces of chromosome separation and could inspire resilient designs in engineering.

science3 months ago

Australia's ballista spider hurls silk snare to ambush aggressive ants

A team describes the ballista spider (Propostira sp.) from Cape York, Australia, which builds a spring-loaded conical snare that is triggered by the green tree ant (Oecophylla smaragdina). The spider yanks ants into its core web at accelerations up to 1,367 m/s^2, then wraps and consumes them. The silk snare stores about 78 kJ per kilogram and can deliver roughly 11.7 MW of power, outperforming other known biological catapults. This extreme prey specialization and predation mechanism may rely on pheromones to attract the ants and represents a remarkable biomechanical adaptation.

Global study reveals subtle left-turn bias in human movement
science4 months ago

Global study reveals subtle left-turn bias in human movement

An international study published in Nature Communications finds people show a modest but consistent bias to turn left (counterclockwise) when walking, persisting across cultures, spaces, and even solo experiments. The bias is stronger in younger participants and does not depend on dominant hand, sex, or eye movement; researchers ruled out explanations like the Coriolis effect or large-scale forces, pointing to a possible biomechanical basis. The finding could influence the design of evacuation routes and crowd-flow planning in airports, museums, stadiums, and other crowded spaces, with future work including VR testing and cross-species comparisons.

Humans Instinctively Turn Counterclockwise When Changing Direction, New Study Finds
science4 months ago

Humans Instinctively Turn Counterclockwise When Changing Direction, New Study Finds

A Nature Communications study across Spain and Japan found that people—whether alone, in crowds, or in schools—tend to turn counterclockwise when changing direction, suggesting a biologically rooted symmetry-breaking rather than a social habit. The bias persisted across cultures and was even stronger in nursery children, with a minority who favored clockwise or showed no bias. While intriguing, researchers caution it is not a universal law and plan follow-up work with virtual reality and more complex scenarios (e.g., emergencies) to uncover origins and applications in crowded spaces.

Sperm Harness Odd Elasticity to Swim Through Viscous Fluids
science4 months ago

Sperm Harness Odd Elasticity to Swim Through Viscous Fluids

Researchers show human sperm and algae like Chlamydomonas propel through viscous fluids by internal energy creating traveling waves via odd elasticity, a non-reciprocal response that can overcome the scallop theorem; the odd elastohydrodynamics framework separates internal flagellar forces from external drag and could inspire bio‑inspired micro‑robots.

Personalized gait tweaks ease knee osteoarthritis pain, study finds
health4 months ago

Personalized gait tweaks ease knee osteoarthritis pain, study finds

A yearlong randomized trial found that individualized gait retraining—adjusting foot angle by a personalized amount to reduce knee loading—significantly reduced knee pain and slowed cartilage deterioration in medial knee osteoarthritis, with results comparable to pain medications. The six-week training used vibration feedback to help participants maintain their new walking pattern, and after a year participants stayed close to their prescribed angles. While promising, the approach requires specialized gait assessment and is not yet ready for wide clinical use; future delivery could involve wearable sensors or clinic-based PT.

Heartbeats may keep heart cancers rare, study suggests
science5 months ago

Heartbeats may keep heart cancers rare, study suggests

New research suggests the heart’s rhythmic beating creates mechanical strain that suppresses cancer growth in heart tissue. In mouse experiments, non‑beating transplanted hearts rapidly developed cancer, while beating native hearts largely resisted it and restricted cancer to the outer layers; engineered heart tissue that beat only when stimulated with calcium showed a similar pattern. This mechanical effect could help explain why heart tumors are extraordinarily rare in mammals.

Stiffer Colon Tissues in Youth Linked to Early-Onset Colorectal Cancer
science7 months ago

Stiffer Colon Tissues in Youth Linked to Early-Onset Colorectal Cancer

UT Dallas and UT Southwestern researchers found that colon tissue from younger colorectal cancer patients is abnormally stiff due to fibrotic collagen, in both tumor and nearby healthy tissue, and experiments with cells on stiff substrates and patient-derived organoids show stiffness promotes faster cancer growth; the study suggests biomechanical forces may contribute to rising cases of early-onset colorectal cancer and could guide future diagnosis and therapy, published in Advanced Science.