Looking at record-setting scores, and National tournament qualifying scores, the slalom performance levels taper off significantly for the 'senior' age divisions but I don't know what age related deficits cause the greatest problems. At glance it seems Men9 performances are about 4 passes lower difficulty than Men3 performances in 1985.
I am preparing to resume competitive skiing at age 75. My last tournament was at age 40. With no experience with competitive skiing at this age, I don't know which age deficit causes the greatest decline and which deficit the least decline in slalom performance. This would vary by individual but there must be some generalizations that are true.
The lifetime snow skiers my age ski just as well as they did when they were 40 - they are good in powder but stay away from steep mogul runs. Obviously slalom water skiing has a large strength component that snow skiing doesn't have, but otherwise it seems similar . . . applying skills with relatively static body position. A separate subject . . I am imagine that trick skiers have a greater challenge. Their body positions are very dynamic and require high levels of quickness, balance and flexibility.
By next July I will probably know some answers, but would like to prepare with training that may possibly help.
Any feedback from some senior type skiers who have been at it for years would be appreciated.