Cheating in the most-polite sport, curling and what is "sledhead?"

What It Covers

NPR's Up First Winter Games covers three major Olympic storylines: Canada's curling team faces cheating allegations over illegal stone-touching violations, environmental concerns about Italy's Olympics requiring 380 Olympic swimming pools worth of artificial snow, and the neurological condition "sled head" affecting bobsled athletes from repeated high g-force exposure.

Key Questions Answered

• •Curling Rule Violations: Canadian curler Mark Kennedy allegedly touched the stone after release while crossing the hog line multiple times, violating curling's self-reporting ethics code. World Curling Federation issued rule clarifications stating athletes cannot touch stones during forward motion and added officials to monitor hog lines, though teams can decline observation. Canada received warnings for inappropriate language after Kennedy swore at Swedish accusers on live television.
• •Olympic Environmental Impact: Milan-Cortina Olympics requires approximately 380 Olympic swimming pools worth of water for artificial snow production, drawn from alpine springs and rivers already stressed by climate change. Organizers approved 98 infrastructure projects, with 60% lacking in-depth environmental assessments. Cortina's controversial bobsleigh track required cutting hundreds of old-growth larch trees despite initial plans to use Austria's existing facility, driven by national pride concerns from Italy's deputy prime minister.
• •Sled Head Neurological Condition: Bobsled, luge, and skeleton athletes experience up to five g-forces during routine runs, causing brain tissue to move within the skull independent of helmet protection. Neurophysiologist Peter McCarthy identifies subconcussive impacts from repeated vibrational exposure as creating gradual nervous system wear. Former skeleton athlete Aliyah Snyder medically retired after two years, now treats athletes for sled head through early intervention and rehabilitation protocols.
• •Olympic Performance Updates: Norway's Johannes Klabo won his fourth gold medal at these games, becoming the most decorated Winter Olympian with nine career golds and two remaining events as favorite. American Jordan Stoles set his second Olympic record in 500-meter speed skating, halfway to his four-gold goal. Brazil's Lucas Pinheiro Broughton won giant slalom, marking South America's first Winter Olympic medal, while Mikaela Shiffrin finished eleventh in giant slalom.
• •Sport Safety Monitoring Gaps: Sliding sports federations monitor concussions but lack g-force tracking systems during training runs where athletes complete multiple daily descents. Scientists recommend attaching sensors to helmets for measuring cumulative exposure, similar to NFL's CTE protocols. Without regulatory changes, athletes continue competing through sled head symptoms including dizziness, cognitive problems, and emotional dysregulation, risking exponential long-term neurological damage from unmonitored subconcussive impacts.