If you intend to submit a paper to Sportscience, you should download the template from the Information for Authors page at the Sportscience site.
Whether you are submitting your article to Sportscience or to another journal, you should read my guidelines on scientific writing (Hopkins, 1999).
Write at least five to eight clear, concise sentences.
Interpret the outcomes qualitatively, explaining any major limitations in generalizing to real populations. Be as economical with words as possible, but do not compromise grammar.
Please follow the instructions for each subheading.
Omit or change the subheadings as necessary for a paper in another journal.
Then focus in on the problem that your study addresses.
State the aim in the first sentence of this section.
Well-written introductions set the tone for the paper, catch the reader's interest, and communicate the hypothesis or thesis statement.
There's no official word count for an introduction but brevity is the soul of clarity.