HMS, TIP 2022 HSC 17 MC

The table shows the physiological adaptations an athlete has experienced as a result of an 8 -week training program.

\begin{array} {|l||l|}
\hline
\rule{0pt}{2.5ex}\textbf{Physiological adaptation}\rule[-1ex]{0pt}{0pt} & \textbf{Effect} \\ 
\hline
\rule{0pt}{2.5ex}\text{Stroke volume}\rule[-1ex]{0pt}{0pt} & \text{Increased}\\
\hline
\rule{0pt}{2.5ex}\text{Cardiac output}\rule[-1ex]{0pt}{0pt} & \text{Increased}\\
\hline
\rule{0pt}{2.5ex}\text{Resting heart rate}\rule[-1ex]{0pt}{0pt} & \text{Decreased}\\
\hline
\rule{0pt}{2.5ex}\text{Fast twitch muscle fibre size}\rule[-1ex]{0pt}{0pt} & \text{Increased}\\ 
\hline
\end{array}

Which of the following identifies the principles of training most likely to have been applied in the training program to produce these adaptations?

1. Specificity, progressive overload, variety
2. Variety, reversibility, warm up and cool down
3. Specificity, progressive overload, training thresholds
4. Warm up and cool down, progressive overload, training thresholds