Dio Cassius 27.17
“This is the daily routine Severus used when there was peace. He was always doing something before dawn and after that you used to take a walk while talking and listening about the matters of the empire. Then he would have a judicial court, except when there was some festival or another. And he used to do this best of all—for he provided ample time for those who were arguing the case and he provided those of us who were advising him lots of time too. He used to make judgments until midday and then he would ride his horse as much as he was able. Then he would take a bath after engaging in some kind of exercise. Following this, he would have no meager lunch either on his own or with his children.
After lunch, he usually napped for a bit. When he rose, he turned to the rest of his affairs and then used to spend time engaged in both Greek and Latin debates while walking again. Near dusk, he would bathe again and then dine with those who were attending him—for he did not frequently have a guest for dinner and he would only sponsor expensive banquets on days when it was necessary. He lived for sixty-five years, plus eight months and twenty-five days. Even at the end, he demonstrated his eagerness for activity: as he was dying he said: “come here, give me whatever there is to do.”
…ἐχρῆτο δὲ ὁ Σεουῆρος καταστάσει τοῦ βίου εἰρήνης οὔσης τοιᾷδε. ἔπραττέ τι πάντως νυκτὸς ὑπὸ τὸν ὄρθρον, καὶ μετὰ τοῦτ᾿ ἐβάδιζε καὶ λέγων καὶ ἀκούων τὰ τῇ ἀρχῇ πρόσφορα· εἶτ᾿ ἐδίκαζε, χωρὶς εἰ μή τις ἑορτὴ μεγάλη εἴη. καὶ μέντοι καὶ ἄριστα αὐτὸ ἔπραττε· καὶ γὰρ τοῖς δικαζομένοις ὕδωρ ἱκανὸν ἐνέχει, καὶ ἡμῖν τοῖς συνδικάζουσιν αὐτῷ παρρησίαν πολλὴν ἐδίδου. 2ἔκρινε δὲ μέχρι μεσημβρίας, καὶ μετὰ τοῦθ᾿ ἵππευεν ἐφ᾿ ὅσον ἂν ἐδυνήθη· εἶτ᾿ ἐλοῦτο, γυμνασάμενός τινα τρόπον. ἠρίστα δὲ ἢ καθ᾿ ἑαυτὸν ἢ μετὰ τῶν παίδων, οὐκ ἐνδεῶς. εἶτ᾿ ἐκάθευδεν ὡς πλήθει· ἔπειτ᾿ ἐξαρθεὶς τά τε λοιπὰ προσδιῴκει καὶ λόγοις καὶ Ἑλληνικοῖς καὶ Λατίνοις συνεγίνετο ἐν περιπάτῳ. εἶθ᾿ οὕτω πρὸς ἑσπέραν ἐλοῦτο αὖθις, καὶ ἐδείπνει μετὰ τῶν ἀμφ᾿ αὑτόν· ἥκιστά τε γὰρ ἄλλον τινὰ συνέστιον ἐποιεῖτο, καὶ ἐν μόναις ταῖς πάνυ ἀναγκαίαις ἡμέραις τὰ πολυτελῆ δεῖπνα συνεκρότει. ἐβίω δὲ ἔτη ἑξήκοντα πέντε καὶ μῆνας ἐννέα καὶ ἡμέρας πέντε καὶ εἴκοσι2 (τῇ γὰρ ἑνδεκάτῃ τοῦ Ἀπριλίου ἐγεγέννητο), ἀφ᾿ ὧν ἦρξεν ἔτη ἑπτακαίδεκα καὶ μῆνας ὀκτὼ καὶ ἡμέρας τρεῖς. τό τε σύμπαν οὕτως ἐνεργὸς ἐγένετο ὥστε καὶ ἀποψύχων ἀναφθέγξασθαι· “ἄγετε, δότε, εἴ τι πρᾶξαι ἔχομεν.
This compares favorably, I think, to the recently shared schedule of Mark Wahlberg.