Green wigs were donned by staff at David Lloyd Maidenhead to raise cash for Sport Relief.
Member of the management team at the gym took fitness outside and could be seen peddling exercise bikes in the sunshine of Grenfell Island on Wednesday.
General manager Neil Austen described their headwear as 'a bit Austen Powers'.
The event was the first in a series the gym hosted to raise money for the campaign.
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The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.