How many lanes does an olympic pool have?
No context provided
How many total lanes does an olympic pool have since 2008?
10 ten
The new Olympic-sized swimming pool was designed to provide advantages to assist the swimmers, the first being the increase in the number of lanes. Increasing the lane count from eight to ten gives the swimmers a "buffer lane", helping to absorb waves generated by the swimmers' movements, allowing for less resistance against the swimmers. Moreover, increasing the depth of the pool further gives swimmers another advantage, as the added depth assists the lane lines in dissipating water churn from the swimmers, creating less hydrodynamic drag for the swimmers.
How many lanes does an olympic pool have for racing, disregarding the empty lanes since 2008?
8 eight
Olympic-size swimming pool
No context provided
How many lanes does an olympic pool have prior to 2008?
8 eight 8-lane
Olympic-size swimming pool
https://en.wikipedia.org/wiki/Olympic-size%20swimming%20pool
There must be two spaces 2.5 m (8 ft 2 in) wide outside lanes 1 and 8 (in effect, two empty lanes).[2] The length of 50 metres (164 ft) must be between the touch pads at the end of each lane, if they are used.[2] If starting blocks are used, then there must be a minimum depth of 1.35 metres (4.4 ft) from between 1.0 metre (3 ft) from the end of the pool to at least 6.0 metres (20 ft) from the end of the pool. At all other points, the minimum depth is 1.0 metre (3 ft).[2] If the pool is used for Olympic Games or World Championships, then the minimum depth is increased to 2.0 metres (7 ft)
Olympic-size swimming pool
Since 2008, an Olympic-size swimming pool must be comprised of 10 50 meter long lanes. 8 of these lanes are used for racing, with the remaining two left empty, helping to absorb waves generated by the swimmers' movements and allowing for less resistance against them. Before that year, an Olympic pool had only 8 total lanes.